Prepare the 12-cup muffin tin by greasing or spraying with non-stick cooking spray.
Whisk together the flour, cocoa powder, baking powder, baking soda and salt until well combined. Set aside.
2 cups whole wheat pastry flour, 1 cup unsweetened cocoa powder, 2 ½ teaspoon baking powder, ½ teaspoon baking soda, ½ teaspoon salt
Beat the eggs, brown sugar, avocado, yogurt and vanilla for at least 1 minute.
3 eggs, 1 cup brown sugar, 1 California avocado, 1 cup fat-free Greek yogurt, 1 tablespoon vanilla
Fold the dry mixture into the wet mixture until just combined. Don't over mix!
Evenly distribute the batter in the prepared muffin pan. Sprinkle the tops with a teeny bit of sugar (the kids loved that!)
½ teaspoon turbinado sugar for the top
Bake for 18-20 minutes. I pulled mine out right at 19 and they were perfect.