For a gourmet experience, use organic flour, pasture-raised eggs, and pure local maple syrup. For budget-friendly, frozen blueberries, vegetable oil, and store-brand flour work well. Choose ripe, firm blueberries in season; frozen are a great year-round option. Waffles are done when golden brown, crispy, fluffy, and steam dissipates. For a quicker, less tangy version, skip overnight rise and add more baking powder. For healthier, substitute up to half all-purpose flour with whole wheat. Ensure waffle iron is preheated and greased to prevent sticking. Increase cook time or iron heat for crispier waffles. To reduce sourness, use a younger starter or slightly more sugar.