Crunchy-Topped Oatmeal Cake - Edible Nashville

Ingredients

• 1 stick butter
• 1 cup brown sugar
• 2 eggs
• 1 teaspoon vanilla extract
• 1 1/2 cups self-rising flour
• 1/4 teaspoon salt
• 1 mashed banana
• 3/4 cup cooked oatmeal
• 1/2 cup (2 ounces) flaked coconut
• 1/3 cup chopped nuts
• 1/4 cup brown sugar
• 3 tablespoons butter, melted
• 2 tablespoons milk