Finely ground Biscoff cookies are added to the Biscoff Butter Cookies dough, making these cookies wonderfully light, crispy, crunchy, spiced, and so addictive.
Preheat oven to 340℉/170℃ and line a baking sheet with parchment paper or silicone baking mat.
Blend 6 Biscoff cookies in a food processor until finely ground. Set aside.
Using a mixer or spatula, cream together butter and confectioners sugar until well incorporated. Add milk and vanilla extract. Mix until well combined.
Sift in flour, cornstarch, and salt to the butter mixture. Add finely ground Biscoff cookies and mix with a spatula until well incorporated.
Add a French star piping tip to the piping bag. Spoon a little bit of dough into the piping bag and try piping a swirl or line on the prepared baking sheet. If the dough is too thick to pipe, transfer the dough back to the mixing bowl and add 1 tsp of milk. If the dough is creamy enough to pipe, continue piping the dough in swirls or lines, leaving 2-inch apart on the baking sheet. (*see video for a visual guide)
Blend 2 Biscoff cookies in a food processor until finely ground. Sprinkle the top of each cookie with ground Biscoff cookies.
Bake for 15-17 minutes or until the edges are light brown.
Remove from the oven and immediately transfer them to a wire rack to cool completely.
Notes
This recipe will make crisp and tender cookies with a snap. If you prefer chewier cookies, substitute the milk with 1 egg yolk and substitute cake flour and cornstarch with the same amount of all-purpose flour.Make sure to measure the flour correctly if using volume measurement. The cookies will end up too hard to pipe if you add too much flour. Use a spoon to scoop the flour into the measuring cup. Then, level the top with a knife or other straight-edged utensil.If you don't have a large piping tip, you can alternatively use a cookie press to shape the cookies. If you don't have a cookie press or large piping tips, snip 1/2-inch corner off the end of a plastic bag and pipe lines/flat swirls.