Salted Cookie Butter Millionaire's Shortbread Recipe on Food52 (2024)

Bake

by: Jesse Szewczyk

December1,2022

4

6 Ratings

  • Prep time 4 hours 35 minutes
  • Cook time 2 hours 50 minutes
  • makes 24 bars

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Author Notes

Speculoos are lightly spiced cookies originating from Belgium. They’re crunchy, perfectly spiced, and understated. If you’ve ever snacked on free cookies during a long flight, chances are you’ve had speculoos. The cookies are delicious dunked into hot coffee or eaten all on their own, but even more tempting when pureed into a creamy, peanut butter-like spread called cookie butter. The indulgent, moreish spread has become increasingly popular throughout grocery stores in the States, and this recipe utilizes the beloved butter to bolster classic millionaire’s shortbread cookies with a spiced, nutty flavor.

A base layer of tender shortbread gets topped with a salted speculoos caramel that lets the flavor of the cookie butter shine. Two cookie butter-spiked ganaches—one made with dark chocolate and one with white—finish off the cookie bars to create a swirling, galaxy-like pattern. A final flourish of flaky sea salt balances out the sweetness and drives the salty-sweet flavor profile home. It’s a bit of a project, but one that is well worth the effort: The striking pattern and unexpected flavor profile will steal the spotlight at any cookie swap. You can feel free to break up the steps into multiple days, tackling just one layer at a time. (Adapted from recipes from Cookies: The New Classics and Cook’s Illustrated.)

Note: Speculoos cookie butter can be found in specialty grocery stores or easily ordered online. Biscoff and Trader Joe’s brand cookie butter would both work well in this recipe.
Jesse Szewczyk

Test Kitchen Notes

To bake these cookies alongside Jesse Szewczyk—and hear more about how this recipe came together—listen to the latest episode of our podcast, Play Me a Recipe. —Food52

  • Test Kitchen-Approved

What You'll Need

Ingredients
  • Shortbread Base
  • 1 2/3 cups(214g) all-purpose flour
  • 1/3 cup(67g) granulated sugar
  • 1/2 teaspoonkosher salt
  • 12 tablespoons(1 1/2 sticks/170g) unsalted butter, melted
  • 1 large egg yolk
  • 1 teaspoonvanilla extract
  • Salted Speculoos Caramel
  • 3/4 cup(175 grams) packed light brown sugar
  • 4 tablespoons(1/2 stick/57g) unsalted butter
  • 1/4 cup(59 ml) light corn syrup
  • 1 14-ounce can (414 ml) sweetened condensed milk
  • 1/3 cup(90 grams) speculoos cookie butter (see Note)
  • 1 teaspoonvanilla extract
  • 1 teaspoonkosher salt
  • Topping
  • 1/2 cup(about 3 ounces/85 grams) semisweet chocolate chips
  • 1/2 cup(about 3 ounces/85 grams) white chocolate chips
  • 4 tablespoons(59 ml) whole milk, divided
  • 2 tablespoons(36 grams) speculoos cookie butter, divided
  • Flaky sea salt, for sprinkling
Directions
  1. Make the shortbread base: Heat the oven 325°F. Grease an 8- by 8-inch baking pan with nonstick pan spray and line with parchment paper, leaving overhang on all four sides.In a large bowl combine the flour, granulated sugar, and salt. Add the melted butter, egg yolk, and vanilla extract and stir together until a soft dough forms.Transfer the dough into the lined baking pan and press into an even layer. Prick the top several times with a fork and bake until the shortbread is slightly puffed and golden brown in the center, 33 to 38 minutes. Remove from the oven and use the bottom of a measuring cup or a metal spatula to press down on the shortbread to compact it slightly. (This will prevent the bars from crumbling when sliced.) Let the shortbread cool for 30 minutes.
  2. While the shortbread is cooling, make the caramel: In a medium saucepan fitted with a candy thermometer, combine the brown sugar, butter, corn syrup, sweetened condensed milk, speculoos cookie butter, vanilla, and salt. Cook over medium-low heat, stirring often to prevent burning, until the mixture is smooth, glossy, and registers 240°F on the candy thermometer, about 8 to 11 mins. Pour over the shortbread base, spread into an even layer, and transfer into the fridge. Let cool for 1 hour.
  3. As the caramel is cooling, make the topping: Place both the white and semisweet chocolate chips in two separate medium, microwave-safe bowls. Add 2 tablespoons whole milk and 1 tablespoon cookie butter to each bowl. Microwave each bowl on high power in 10 second increments, stirring between each, until the chocolate is completely melted and the mixture is smooth, about 30 seconds total. Transfer the white chocolate ganache into a piping bag or zip-top baggie.
  4. Working quickly, pour the dark chocolate ganache over top of the caramel and spread into an even layer. Pipe thin, straight lines of the white chocolate ganache all going the same way. (You might not need all of the ganache.) Use a toothpick to drag it through the lines, alternating the direction you go each time to create a rough chevron pattern. Transfer the bars into the fridge and let set for at least 4 hours, preferably overnight.Sprinkle the top of the bars with flaky sea salt and cut into a 3 by 8 grid to make 24 bars. (For cleaner edges, feel free to trim off the border of the pan before slicing.) Serve chilled or at room temperature.

Tags:

  • Cookie
  • Biscuit
  • American
  • Dairy
  • Chocolate
  • Egg
  • Chill
  • Bake
  • Entertaining
  • Christmas
  • Christmas Eve
  • Holiday

See what other Food52ers are saying.

  • Ellen White

  • Cheryl Gregg

  • Lsd

Popular on Food52

3 Reviews

Ellen W. December 21, 2022

This is ABSOLUTELY DELICIOUS. My candy thermometer wasn’t moving quickly so I stopped trusting it and used my instant read for the caramel. Took the caramel off when it hit 240 on my instant thermometer and my candy thermometer still said 220 and the caramel has a perfect chew! I’m definitely making this again-it’s absolutely beautiful! My roomies couldn’t stop eating it 🤗

Lsd December 20, 2022

Quite phenomenal. The cookie butter made it even better. I followed directions as written. I was nervous it was going to be too sweet, and while this is a decadent treat, I didn’t feel it was crazy, over-the-top sweet. Maldon salt flakes on top is absolutely the “cherry” on top.

Cheryl G. December 17, 2022

This looked too delicious to not give a whirl (despite my hesitation to try an unreviewed recipe). But 240 on my candy thermometer left me with a tooth-breaking hard caramel that I didn't want to risk giving guests. I instead found another recipe that suggested 225, which left me with a gooier (and safer) bar.

Salted Cookie Butter Millionaire's Shortbread Recipe on Food52 (2024)

FAQs

Is salted or unsalted butter better for shortbread cookies? ›

If you don't have salted butter, unsalted butter will also work, simply add about ¼ teaspoon of salt to the cookie dough. The reason the salt is needed is because salt brings out the flavor in the cookies, without it, your cookies will taste bland.

What happens if you add too much butter to shortbread cookies? ›

Butter is an emulsifier and it makes cookies tender. It also adds in the crispy-around-the-edges element. Adding too much butter can cause the cookies to be flat and greasy. Adding too little butter can cause the cookies to be tough and crumbly.

How to stop chocolate cracking when cutting millionaire shortbread? ›

**If you struggle to cut your shortbread and tray bakes without the chocolate cracking on top, set it at room temperature rather than in the fridge and it'll be softer so therefore won't crack when you cut it!

Why is it called Millionaire shortbread? ›

The name "millionaire's shortbread" appears to have originated in Scotland. The "millionaire" prefix to millionaire's shortbread or millionaires slice implies a level of decadence and wealth to the sweet treat, that it is an upgrade from regular shortbread.

What happens if you use salted butter instead of unsalted in baking? ›

If you're baking and swapping in salted butter, the excess water from salted butter may make more of an impact. This is because extra water can have an effect on how gluten reacts and forms within dough. Consider slightly lessening any additional water the recipe may call for.

What happens if I use salted butter instead of unsalted cookies? ›

Can I Use Salted Butter to Replace Unsalted Butter and Visa Versa? In a pinch, you can replace unsalted butter with salted, as long as you reduce the amount of additional salt in the recipe.

What are common mistakes when making shortbread? ›

The most common mistakes when making shortbread are over-working the dough, and incorporating too much flour. The less you work the dough, the more crumbly and melt-in-your-mouth your shortbread cookies will be.

What is the secret to good shortbread? ›

Tips To Make the Best Shortbread Cookies
  • Choose High Quality Butter. No matter what brand of butter you buy, if it's real butter, you can rest assured that it's the best. ...
  • Keep Ingredients Simple. ...
  • Add Flavor. ...
  • Don't Overwork. ...
  • Shape Dough. ...
  • Chill Before Baking. ...
  • Bake Until Golden. ...
  • Add Finishing Touches.

What not to do when making shortbread? ›

Avoid making your shortbread too thick

This is much thicker than a roll-and-slice sugar cookie — or really any other popular type of cookie. If you keep your dough any thicker, you risk the dough coming out of the oven raw. If it's any thinner, the cookie will have a crispy texture with the snap of a graham cracker.

What is a substitute for golden syrup in Millionaire shortbread? ›

The best substitution for golden syrup is a light corn syrup, also called maize syrup. It's a refined sugar syrup made from corn starch and usually flavoured with vanilla too. This is usually a bit thinner than golden syrup but should add the same sweetness, with only a slightly different flavour and lighter colour.

How to cut millionaires shortbread without it cracking? ›

Slice using a hot, sharp knife.

Run a sharp, large knife until hot water for a minute or so. Then dry with a cloth and slice through the Millionaire's Shortbread. The heat with soften the layers and prevent the chocolate on top from cracking.

What's the difference between millionaire and billionaire shortbread? ›

While Millionaire's shortbread has a soft caramel filling, Billionaire's shortbread has salted caramel sauce in the center.

Is Twix the same as Millionaire shortbread? ›

Millionaire Shortbread aka Twix Bars

Enjoy a slice of rich, decadent Millionaire Shortbread, also known as Caramel Squares or homemade Twix Bars with an easy shortbread crust, gooey caramel layer and smooth milk chocolate topping.

What is shortbread called in Scotland? ›

Shortbread or shortie is a traditional Scottish biscuit usually made from one part white sugar, two parts butter, and three to four parts plain wheat flour. Shortbread does not contain any leavening, such as baking powder or baking soda.

How to thicken caramel for millionaires shortbread? ›

Place the caramel (or dulce de leche or sweetened condensed milk) into a medium pot with the butter, sugar and salt. Heat on medium, stirring often, until the butter has melted. Turn the heat to low and continue to cook, stirring often, for 7-10 minutes until the caramel has thickened and darkened.

Why use unsalted butter in shortbread? ›

Unsalted butter is most commonly called for in baking recipes. Unsalted butter has a very neutral, creamy flavor—a great base for many baked goods. In baking, precise measurements are key for achieving the right flavor and texture. This even extends to small amounts of ingredients like salt.

What is the secret to making good shortbread cookies? ›

Tips To Make the Best Shortbread Cookies
  1. Choose High Quality Butter. No matter what brand of butter you buy, if it's real butter, you can rest assured that it's the best. ...
  2. Keep Ingredients Simple. ...
  3. Add Flavor. ...
  4. Don't Overwork. ...
  5. Shape Dough. ...
  6. Chill Before Baking. ...
  7. Bake Until Golden. ...
  8. Add Finishing Touches.

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