Gather protein powder
Gather oats or oat flour
Gather nut butter
Gather honey, maple syrup, or dates
Gather milk or water
Gather salt
Gather optional add-ins like seeds, nuts, chocolate chips, or dried fruit
Mix dry ingredients in a bowl
Mix wet ingredients in a separate bowl
Combine wet and dry ingredients
Add liquid slowly until the mixture holds together
Press mixture firmly into a lined pan
Smooth the top evenly
Chill in the refrigerator until firm
Cut into bars
Store in an airtight container in the refrigerator or freezer