Banana Nut Muffins with Streusel Topping Ingredients 1/2 cup unsalted butter, at room temperature 1/2 cup packed brown sugar 1/2 cup granulated sugar 3/4 cup mashed ripe bananas, (about 3 medium bananas) 2 eggs - I use free range 1 1/4 cups all purpose flour 3/4 tsp baking soda 1/2 tsp kosher salt Streusel Topping