01 - Line a baking sheet with parchment paper. Scoop 12 heaping teaspoons of Biscoff spread onto the prepared sheet. Freeze for at least 30 minutes until completely solid.
02 - Preheat oven to 350°F. Line a second baking sheet with parchment paper for baking the cookies.
03 - In a large bowl, beat softened butter, brown sugar, and granulated sugar with electric mixer until light and fluffy, approximately 2-3 minutes.
04 - Beat in egg and vanilla extract until fully incorporated and smooth.
05 - In a separate medium bowl, whisk together flour, baking soda, and salt until well blended.
06 - Gradually add dry ingredients to wet ingredients, mixing on low speed just until combined. Do not overmix.
07 - Gently fold white chocolate chips and crushed Biscoff cookies into the dough using a spatula.
08 - Scoop 2 tablespoons of dough per cookie. Flatten dough slightly in palm, place a frozen Biscoff ball in center, and wrap dough around filling, sealing completely.
09 - Arrange stuffed dough balls on prepared baking sheet 2 inches apart. Refrigerate for 15 minutes to prevent excessive spreading.
10 - Bake for 11-13 minutes until edges are golden brown and centers appear slightly underdone. Cool on baking sheet for 5 minutes, then transfer to wire rack. Serve warm for optimal molten center.