Store-bought muffin mixes contain all the dry ingredients required for a recipe. All you add is water, oil and eggs. Muffin mixes have more uses than just plain muffins, including taking the boxed mix and creating a bread. The main problem you encounter is the flavor, as even when you make a bread, it still retains the taste and flavor of the muffins.
Muffin mixes sold in the stores fall under the category of quick breads. Quick breads contain leavening agents like baking soda or baking powder that reacts to the heat of your oven. The heat produces stem, which cooks the bread quickly and evenly. The muffin mixes work well as a bread, especially when you opt for a muffin mix that has a bread counterpart. Banana walnut muffin mix turns into a loaf of banana walnut bread when baked in a loaf pan.
Mixing and Baking
Pour the muffin mix into a large bowl and slowly add your wet ingredients, following the manufacturer’s recommendations on the package. Carefully spoon the batter into a lightly greased loaf pan or a nonstick loaf pan. Bake the mixture in the loaf pan for 35 to 40 minutes at 350 degrees Fahrenheit. Muffins take 20 minutes or less. Test the bread by inserting a knife or toothpick into the center of the loaf pan. The toothpick should be clean without any wet batter clinging to the surface.
When making bread from a muffin mix, use a loaf pan and add batter until you reach one inch from the top of the pan. As the mix bakes, the steam causes the expansion of the batter, which forces the batter up and over the pan. If you worry about the batter falling over the sides, then bake the loaf pan on top of a cookie sheet. The cookie sheet catches any spills and stops the batter from falling into the oven. Depending on the size of your loaf pan and the size of your muffin mix, you may have a small amount of leftover batter.
Do not use muffin mix with a bread maker. Bread makers require a different mixture for baking than your traditional oven does. Stores sell bread mixes and muffin mixes specifically designed for use in a bread maker. The size of the packages are different and you may not have enough mix for a full loaf or you might have too much mix.
References and ResourcesFood.com: "The Best" Banana Bread (or Muffins!)
Muffin & Bread Recipes: Easy Bread Recipes - Focus on Muffins and Quick Breads
Betty Crocker: Muffins FAQ's