Banana Nut Oatmeal Whole Wheat Muffins

I came up with this recipe for muffins while in Vegas this last week, and they are so healthy and yummy that I've made them three times in one week.

Banana Nut Oatmeal Whole Wheat Muffins
Makes 18 largish muffins 250 calories each
Or 24 regular muffins less than 200 calories each

1/2 cup unsalted butter
1 1/2 cups brown sugar
1 cup milk
1 cup plain yogurt
2 eggs
1/2 tsp salt
1/2 tsp cinnamon
1/2 tsp nutmeg
2 cups rolled oats
2 cups whole wheat flour
1 Tbsp baking powder
4 bananas, smashed
1/2 cup pecans

Pre-heat oven to 400ºF. Mix sugar and butter together, add milk, yogurt and eggs. Mix until smooth. Mix together salt, cinnamon, nutmeg, oats, flour, and baking powder in separate bowl. Combine with wet mixture. Stir in mashed bananas and pecans. Fill muffin tins nearly full and bake for about 18 minutes or until done.