flesh from 1 ripe to very ripe medium/large Hass avocado, mashed very well (about 3/4 cup)
3/4 cups granulated sugar
1/3 cup canola or vegetable oil (melted coconut oil may be substituted)
1/3 cup Greek yogurt or sour cream (use vegan versions if desired)
1/4 cup light brown sugar, packed
2 teaspoons vanilla extract
3/4 teaspoon cinnamon
3/4 teaspoon nutmeg
pinch salt, optional and to taste
1 cup all-purpose flour
1 tablespoon baking powder
1 1/2 cups frozen blueberries (keep them frozen, do not thaw them; fresh berries may be substituted and baking time may be a few minutes less)
2 tablespoons all-purpose flour, for tossing berries