01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper and set aside.
02 - In a medium bowl, whisk together the all-purpose flour, rolled oats, baking soda, and salt until evenly distributed.
03 - In a large bowl, beat the softened butter, Biscoff spread, light brown sugar, and granulated sugar using an electric mixer until creamy, smooth, and light in texture.
04 - Add the egg and vanilla extract to the butter mixture, beating until fully incorporated and the batter is uniform.
05 - Gradually stir the dry ingredient mixture into the wet ingredients, mixing just until no dry pockets remain. Avoid over-mixing to keep the cookies tender.
06 - Gently fold the roughly chopped Lotus Biscoff cookies into the dough until evenly dispersed throughout.
07 - Scoop tablespoon-sized portions of dough and roll into balls. Place on the prepared baking sheets, spacing each about 2 inches apart to allow for spreading.
08 - Bake for 10 to 12 minutes, rotating the sheets halfway through, until the edges are golden brown and the centers appear just set.
09 - Let the cookies rest on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely before serving or storing.