Heat oven to 350 degrees. Generously grease 8 fluted tube muffin cups with cooking spray or shortening (or 12 regular size cupcake cups). In a medium bowl stir together flour, sugar, baking powder, baking soda and salt; set aside.
In a large bowl, beat remaining ingredients with a whisk until well blended. Gradually add in flour mixture and stir in until well combined and batter is fluffy. Divide batter evenly among 8 fluted muffin cups.
Bake 15 minutes or until toothpick inserted in center of cake comes out clean. Cool in pan 2 minutes. If necessary, loosen sides of cake around the edge with a small paring knife. Turn upside down and gently remove from the tin and let cool.
Notes
If you want to switch out the flour for almond, coconut, or whole wheat flour, you definitely could. However, the taste and texture will be completely different with any of those replacements.