Chocolate-Chocolate Chip Pancakes: Fold 1/2 cup cocoa powder and 3 ounces chocolate chips into the batter.
Blueberry: Fold 1 cup frozen blueberries into the batter.
Banana-Nut: Fold 1 cup thinly sliced bananas and 4 tablespoons finely chopped toasted pecans into the batter.
Buttermilk powder, such as Saco Buttermilk Blend, is a useful substitute for fresh buttermilk. Look in the baking section or with the powdered milk in most markets.
Dried egg whites are convenient in recipes calling for egg whites because there is no waste. Look for brands like Just Whites in the baking or natural-foods section of most supermarkets or online at bakerscatalogue.com.
You can find flaxseed meal in the natural-foods section of large supermarkets. You can also start with whole flaxseeds: Grind 2/3 cup whole flaxseeds to yield 1 cup.