Whole-Wheat Banana Nut Muffins - Grassland Butter

Ingredients

• 1 1/2 cups whole­-wheat flour
• 3/4 teaspoon baking soda
• 1/2 teaspoon salt
• 1/4 teaspoon baking powder
• 2 eggs
• 1/2 cup Grassland butter melted (1 stick)
• 1/3 cup pure maple syrup
• 2 bananas very ripe (and peeled (the riper they are the sweeter they'll be))
• 1/2 cup walnuts chopped (optional)