These muffins are a combination of homemade banana bread and coffee cake with moist, tender crumbs, and topped with delicious, buttery, brown sugar streusel.
Preheat oven to 375F. Line muffins tins with paper cups or coat with cooking spray.
To make the streusel topping, combine brown sugar, flour, and cinnamon in a bowl and cut in butter with a pastry blender or fork until crumbly. Set aside.
In a large bowl, mash bananas with a fork and beat in brown sugar, egg, creamer, and oil.
Whisk together flour, baking soda, baking powder, and salt in another bowl. Mix dry ingredients into wet ingredients and stir until just incorporated. Fold in chopped pecans.
Spoon the batter into the muffin tins to fill them about halfway and sprinkle crumb toppings evenly over batter. Bake for 18 to 20 minutes, or until the tops are golden brown and a toothpick inserted in the center comes out clean. Let cool in pan for 10 minutes before serving warm or at room temperature.