01 -
Preheat oven to 350°F (175°C). Grease and flour an 8x8 inch baking pan.
02 -
Melt chocolate and butter together in a double boiler or microwave until smooth.
03 -
Whisk in sugar, eggs, and vanilla extract until well combined.
04 -
Gradually add flour and salt, mixing until just combined. Don't overmix!
05 -
Gently fold in crushed Biscoff biscuits.
06 -
Pour batter into pan and bake for 25-30 minutes, or until a toothpick inserted into the center comes out with moist crumbs. Let cool completely before cutting.