And these muffins don't rise a lot but are surprisingly light.
3 cups all bran cereal
2 1/2 cups water
1 - 19 oz can black beans, drained (really!)
2 large eggs
1/4 cup melted butter
1/4 cup cocoa
1 tsp vanilla
2/3 cup sugar
1/2 cup chocolate chips
Add the water to the bran cereal and set aside for 5 minutes.
Take the rest of the ingredients, except the chocolate chips, and process in a food processor until smooth.
Mix together with the bran.
Fill muffin papers 2/3 full.
Sprinkle chocolate chips on top
and bake in a 350F oven for 25 minutes.
Here's another recipe made with beans: