Start checking the sweet potato muffins at 12 minutes, but they might take up to 17 minutes. Mini muffin pans vary quite dramatically in how much batter they hold. u003cbr/u003eu003cbr/u003eBake until the centers are set and springy to the touch. All ovens, pans, and climates vary so use my suggested baking time as only an estimate. Start checking early in case your oven runs hot or your pans are smaller.