Chocolate Chip Streusel Banana Coffee Cake

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   ["1. Preheat your oven to 350u00b0F. Grease and flour a 9"" x 9"" metal baking pan.", "", "2. In a small bowl, mix together chocolate chips, brown sugar, and cinnamon (and nuts, if you're using them). Set aside.", "", "3. Into a medium bowl, sift together flour, baking powder, baking soda, and salt.", "", "4. In a large bowl, beat together sugar, butter, and egg using an electric mixer. Once light and fluffy, beat in mashed bananas and yogurt. When combined, add dry ingredients and mix well.", "", "5. Pour about half your batter into your prepared pan. Layer about 2/3 of your streusel mixture evenly on top of batter. Add remaining batter, followed by remaining streusel.", "", "6. Bake coffee cake for approximately 45-50 minutes, or until a toothpick inserted into the center of your cake comes out clean. Allow to cool completely before cutting."]

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