Identify what butter is doing in your recipe: spreading, browning in a pan, richness in baking, or adding moisture/fat to bind.
Choose the closest match: ghee for browning, oil for sautéing, shortening/margarine for baking structure, and yogurt for moisture-based recipes.
Use the ratio from the table: for reduced-fat or watery substitutes (like yogurt), start slightly lower and adjust after mixing.
If the batter/dough looks too thick or dry, add 1–2 teaspoons of water or milk at a time; if it looks loose, reduce liquid next batch.
For savory dishes, taste at the end and adjust salt—many substitutes (margarine/yogurt) can shift seasoning.