I learned a tip from a friend’s grandmother years ago for clean and easy measuring of messy solids like peanut butter or shortening.
Fill a liquid measuring cup part way with water first, then add the solid ingredient to it. Spill out the water and add the ingredient to your recipe.
Let’s say you need 1/2 cup peanut butter for a recipe. Fill a liquid measuring cup to the 1/2-cup level with cool water. Add peanut butter until the water reaches the 1-cup level. Pour out the water, then pour the peanut butter into the recipe.
Cleanup is soooo easy!