These Bourbon Biscoff Brownies combine rich, fudgy chocolate with a boozy bourbon kick and the unique flavor of Biscoff cookie butter. The brownies are baked with bourbon incorporated into the batter and brushed with more bourbon after baking for moisture and extra flavor. A bourbon-infused Biscoff buttercream frosting and a shiny chocolate glaze elevate these treats into an elegant, party-worthy dessert loved by bourbon and chocolate fans alike.