Speculoos Coffee Cookie Bars — Cookiemas Day 11

♪ On the eleventh day of Cookiemas, I made for you to eat:

coffee speculoos, furikake mac nut, 9 vanillekipferl, 8 ate’s cookies, 7 madeleines, 6 almond cookies,

Shrimp paste PB!

4 Alfajores, calamansi crinkles, ube coconuts

and a choc chip walnut cookie ♪

One more of my well-loved cookie recipes from the days when I sold them.

Coffee speculoos cookie bar

These bars capture the warm, spiced flavors of speculoos that have grown so popular lately. Instead of shaping the dough into traditional cookies, I baked it in a pan to create dense, chewy bars and finished them with a crunchy speculoos topping.

I stirred crushed speculoos cookies (think Biscoff-style biscuits) into speculoos spread and spooned the mixture over the cooled bars for extra texture and flavor.

  • Coffee speculoos bar closeup
  • Coffee speculoos bar sliced

These bars are rich and indulgent—pair them with a bold, bitter coffee to balance the sweetness.

Ingredients

  • 2 1/4 cups (270g) all purpose flour
  • 1 teaspoon baking soda
  • 1 tablespoon corn starch
  • 1 teaspoon salt
  • 3/4 cup (170g) unsalted butter, melted
  • 1 cup (200g) light brown sugar
  • 2/3 cup (133g) granulated sugar
  • 2 eggs
  • 1 tablespoon vanilla extract
  • 2 tablespoons instant coffee
  • speculoos butter, for spreading on top
  • speculoos cookies, crushed for garnish

Directions

1. In a medium bowl, melt the butter. Stir in the vanilla extract and instant coffee until evenly combined. Avoid overmixing so you don’t aerate the butter.

Mixing the wet ingredients

2. Transfer the butter mixture to a large bowl. Add the brown sugar and granulated sugar, then mix. Add the eggs and beat until smooth and well combined.

  • Sugar and eggs
  • Beaten mixture
  • Dough consistency

3. Add the dry ingredients: flour, baking soda, corn starch, and salt. Mix until a uniform cookie dough forms.

Cookie dough spread in pan

4. Preheat the oven to 350°F. Line a square baking dish with parchment paper, press the dough evenly into the pan, and smooth the top with a spatula.

Dough smoothed in baking dish

5. Bake for 30–35 minutes, or until a toothpick inserted into the center comes out clean and no raw dough clings to it.

6. Remove from the oven and let the bars cool completely. In a small bowl, combine speculoos butter with crushed speculoos cookies. Spread this mixture over the cooled bars, then slice and serve.

  • Finished speculoos cookie bars
  • Speculoos bars plated

Recipe

Speculoos bar thumbnail

Coffee Speculoos Cookie Bar

Print Recipe
Pin Recipe
Prep Time 15 mins
Cook Time 30 mins
Total Time 45 mins
Servings: 16 servings
Ingredients
Method

Ingredients

  • 2 ¼ cups (270g) all purpose flour
  • 1 teaspoon baking soda
  • 1 tablespoon corn starch
  • 1 teaspoon salt
  • ¾ cup (170g) unsalted butter, melted
  • 1 cup (200g) light brown sugar
  • ⅔ cup (133g) granulated sugar
  • 2 eggs
  • 1 tablespoon vanilla extract
  • 2 tablespoons instant coffee
  • speculoos butter (to spread on top)
  • speculoos cookies (for garnish)

Method

  1. In a medium bowl, melt the butter. Add the vanilla extract and instant coffee, and mix until just combined.
  2. In a large bowl, combine the butter mixture with the brown sugar and granulated sugar. Add the eggs and beat until smooth.
  3. Stir in the dry ingredients—flour, baking soda, corn starch, and salt—until a cohesive dough forms.
  4. Preheat the oven to 350°F. Line a square baking dish with parchment and press the dough evenly into the pan.
  5. Bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
  6. Cool completely. Mix speculoos butter with crushed speculoos cookies, spread over the bars, slice, and serve.