Identify what your milk is doing in the recipe (liquid for hydration, fat for richness, or protein for structure).
Pick the substitute closest to that job: for creamy richness, choose evaporated milk (diluted) or oat/soy; for tangy tenderness, choose buttermilk or thinned yogurt.
Use the table ratios as your starting point (typically 1:1).
Prep as needed: shake plant milks, dilute thicker milks, and thin yogurt until smooth so your batter doesn’t clump.
Adjust after the first mix—if batter looks too thick, add a splash of water; if it looks too thin, add flour or cocoa by the spoon.