Banana Streusel Muffins

This is a muffin recipe I created from several different adapted muffin recipes. It starts out with a basic muffin recipe, flavored and moistened with some mashed banana. Then add a cinnamon streusel topping. These bake into lovely, moist muffins with a crackly sweet topping.

Banana Streusel Muffins
1/2 cup granulated (white) sugar
1 teaspoon ground cinnamon
1 3/4 cups all-purpose (white) flour
1/2 cup granulated (white) sugar
1 Tablespoon baking powder
1/2 teaspoon salt
1 cup (about 3 medium) mashed overripe banana
2 large eggs
1/4 cup oil
1/4 cup milk

Preheat oven to 400◦F. Line 12 muffin cups with paper liners or grease them.
In a small bowl, mix the sugar and the cinnamon. Set aside.
In a large bowl, stir together the flour, sugar, baking powder, and salt. Make a well in the center.
In a separate medium bowl, mix the banana, eggs, oil, and milk until smooth. Add to the well. Stir until just moistened.
Fill muffin cups 3/4 full with batter. Sprinkle each evenly with cinnamon sugar mixture.
Bake for about 20 minutes, or until a wooden toothpick inserted in the center of a muffin comes out clean.