If your muffins are burning on the outside but remaining raw inside, the issue is likely related to the baking temperature. In this situation, you should try cooking them at a lower temperature rather than a higher one. Burning on the outside can happen when the oven is too hot, causing the outer layer of the muffins to cook faster than the interior.
Here's what you can do to help ensure even baking and avoid the burning/raw dilemma:
Preheat the oven properly: Make sure to preheat your oven to the correct temperature as specified in the recipe. Use an oven thermometer to verify that the temperature is accurate.
Lower the baking temperature: Reduce the oven temperature by 25 degrees Fahrenheit (about 15 degrees Celsius) from the temperature mentioned in the recipe. For example, if the recipe suggests baking the muffins at 375°F (190°C), try lowering it to 350°F (175°C) instead.
Use the correct baking time: Lowering the temperature might require slightly increasing the baking time. Keep an eye on the muffins and use a toothpick or cake tester to check for doneness. Insert it into the center of a muffin; if it comes out clean or with just a few moist crumbs clinging to it, the muffins are ready.
Consider changing the rack position: If you are still experiencing uneven baking, try moving the muffin tin to a different rack position in the oven. Placing it closer to the center might help the muffins bake more evenly.
Use a lighter-colored pan: If you're using a dark-colored muffin tin, it can cause the outer layer of the muffins to brown faster. Switch to a lighter-colored pan or use muffin liners to create a barrier between the batter and the pan.
Avoid overfilling the muffin cups: Overfilling the muffin cups can lead to uneven baking. Fill each cup only about two-thirds full to allow room for the muffins to rise evenly.
Check your oven's calibration: Ovens can sometimes be slightly off in temperature. Consider getting an oven thermometer to ensure your oven is heating accurately.
By adjusting the baking temperature and monitoring the muffins' doneness carefully, you should be able to avoid the issue of burning on the outside while still being raw inside.