Grab all of your supplies and ingredients.
Take some butter or some non-stick cooking spray and grease your pan and spatula.
Dump 4 tbs of butter, ¾ cup of biscoff spread and 16 oz of marshmallows into a microwave safe dish.
Heat everything in the microwave for 30 - 60 seconds.
Once heated, remove and stir well.
Heat again for 30 seconds, stirring again after heating.
Keep doing a 30 second heat followed by a good stir until your marshmallows are well melted and everything is combined.
Add in 6 cups of rice krispie cereal. The bischoff spread can make this rather tough to mix in.
Once the cereal is well combined, move your treats into your pan that has been greased.
Lightly press the treat mixture into the pan using your spatula.
Wait around 30 minutes for the treats to cool
Cut treats into 16 squares using a greased knife.