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 or whisk until light and fluffy.
04 - Mix in the large egg and vanilla extract into the creamed mixture until well combined.
05 - Gradually stir in the dry ingredient 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 approximately 2 tbsp portions onto the prepared baking sheets, spacing each about 2 inches apart. Optionally press extra Biscoff cookie pieces on top of each dough ball.
08 - Bake for 10-12 minutes, until the edges are golden and the centers still appear slightly soft.
09 - Allow cookies to cool on the baking sheets for 5 minutes, then transfer to a wire rack to cool completely.