Oven Temperature too low
Oven temperature is always critical to good baking. Oven performance should be checked frequently to ensure correct temperature and detect hot spots.
Out of Date Product
Dispose of out of date product.
Hot Spots/Cool Spots in oven
Pans should be rotated 180° halfway through baking in a convection oven.
Inadequate pan greasing
Provide adequate coverage of pan release on pans before depositing product; grease tops and cups of muffin pan Grease only tops of pans when using paper liners.
Pans were not rotated in convection oven
Pans should be rotated 180° halfway through baking
Under baking/overloading of oven
Follow package directions for proper baking temperatures and times. Fully loaded ovens reduce oven temperature in the first few minutes of baking. Baking times may need to be extended. Centers of muffins should spring back when lightly touched.
Follow package directions for proper baking temperatures. Have oven checked for accuracy using an oven thermometer.
Over-baking/oven temperature too high
Follow package directions for proper baking temperatures and times. Have oven checked for accuracy using an oven thermometer.
Uneven heat
Deck oven is used to bake muffins
Deck ovens may provide uneven bottom heat. Place a sheet pan under the muffin tins when using a deck oven.
Heat of pan/Moisture of muffin bottoms after removal from oven
Tilt muffins (in muffin cups) approximately 10 minutes after removing from oven.