Step 1

Preheat oven to 375 degrees and line standard-size muffin tins with paper liners.  Spray the liners with nonstick spray.

Step 2

In a large mixing bowl, whisk flour, baking soda, salt, cinnamon, brown sugar, and granulated sugar together.  Set aside.

Step 3

In another mixing bowl, whisk eggs, oil, vanilla, applesauce, and sour cream until smooth.

Step 4

Add the flour mixture to the egg mixture and mix gently until just combined.  Do not overmix.

Step 5

Scoop the muffin batter into each muffin liner, filling 3/4 (or a bit more) full.

Step 6

Bake at 375 degrees for 17-20 minutes, or until a toothpick inserted into the center of the muffin comes out clean.  Cool for a few minutes in the muffin tin, and then remove the muffins to cool on a cooling rack.

Step 7

Once cooled, keep the muffins at room temperature in an airtight container.  These will freeze well for up to three months.