01 - Combine flour, sugar, yeast, and salt in a large mixing bowl.
02 - Add warm milk, warm water, melted butter, and egg to dry ingredients. Mix until a shaggy dough forms.
03 - Knead on a floured surface for 8-10 minutes or use stand mixer with dough hook for 6-7 minutes until smooth and elastic.
04 - Place dough in a greased bowl, cover, and let rise in a warm place for 1 hour until doubled in size.
05 - Punch down dough and roll out on a lightly floured surface to a 16x12-inch rectangle.
06 - Mix softened butter and Biscoff spread until creamy. Spread evenly over rolled dough. Sprinkle with brown sugar and cinnamon.
07 - Roll up tightly from the long edge. Slice into 12 even rolls and arrange in a greased 9x13-inch baking dish.
08 - Cover and let rise for 45-60 minutes until puffy.
09 - Preheat oven to 350°F.
10 - Bake for 22-25 minutes until golden and cooked through.
11 - Whisk melted Biscoff spread, powdered sugar, and 2 tbsp milk until smooth. Add more milk if needed for drizzling consistency.
12 - Drizzle glaze over warm rolls. Serve immediately.