Dissolve yeast in warm milk and let sit for 5 minutes. Add sugar, melted butter, and egg, and mix well. Gradually add flour and salt until a soft dough forms.

Knead the dough on a floured surface for 5-7 minutes until smooth and elastic. Place it in a greased bowl, cover, and let it rise for 1 hour.

Roll the risen dough into a 12 x 16 inch rectangle. Spread Biscoff cookie butter over it, then sprinkle cinnamon and brown sugar.

Roll the dough tightly from one long edge. Slice into 12 equal rolls and place in a greased 9x13 inch baking pan.

Cover the pan and let the rolls rise for 30-45 minutes.

Preheat oven to 350°F (175°C) and bake for 25 minutes until golden brown.

Mix together Biscoff cookie butter, powdered sugar, and milk for the glaze. Once rolls are baked, let cool for 5 minutes and drizzle over them.

Serve warm and enjoy your Biscoff Cookie Butter Cinnamon Rolls!