01 - Preheat oven to 350°F (175°C). Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together the rolled oats, all-purpose flour, baking soda, salt, and ground cinnamon. Set aside.
03 - In a large bowl, beat the softened butter, Biscoff spread, light brown sugar, and granulated sugar using an electric mixer until light and fluffy.
04 - Mix in the egg and vanilla extract until fully combined and smooth.
05 - Gradually stir the dry ingredient mixture into the wet mixture until just incorporated. Avoid overmixing.
06 - Gently fold in the roughly chopped Lotus Biscoff cookies until evenly distributed throughout the dough.
07 - Scoop dough in 2-tablespoon portions onto the prepared baking sheets, spacing them about 2 inches apart. Optionally, press extra Biscoff cookie pieces onto the tops.
08 - Bake for 10 to 12 minutes, until the edges are golden and the centers remain slightly soft.
09 - Allow cookies to cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.