These homemade protein rice krispies taste just as delicious as what you remember from your childhood, but with the added health benefit of extra protein.
Melt butter in a nonstick pot over low heat. Add marshmallows and stir constantly with a rubber spatula until melted. Add protein powder and stir to dissolve.
Remove from heat and gently fold in your cereal until it’s completely coated. (Be careful not to over stir because it will make your bars hard).
Transfer to a 8 x 8 container (lined with parchment paper) and gently press into pan. Wet your rubber spatula to avoid sticking.