Oops! I forgot two important ingredients in the bean muffin recipe I posted yesterday. I added them in this morning. 1/4 tsp baking soda and 1/4 tsp baking powder. If you tried this recipe and the muffins didn't rise up enough, that's why. My apologies.
Also, someone asked me about sugar substituting. I tried using 1/2 tbsp agave nectar and 1/2 tbsp brown sugar today. This is much less sugar than what the original recipe called for, but it's still sweet.