They can be used for baking or warming up in the microwave and are suitable for storing in the freezer or fridge. They are BPA-free and are dishwasher safe. Perfect Bite-Sized Treats - Brownie molds effortlessly create perfectly bite-sized squares of your favorite snacks, including brown butter bites, keto treats, fat bombs, brownies, biscotti, peanut crunch, chocolate treats, and keto-friendly protein bars.