1. Preheat oven to 350 degrees and line pans with cupcake liners.
2. In a small bowl, sift cake mix and flour together.
3. In another small bowl, finely mash bananas with baking soda and lemon juice.
4. In a large bowl, gently whisk eggs, oil, buttermilk, sour cream and vanilla extract.
5. Add mashed bananas to the wet ingredients and stir. Add cake mix/flour and stir again.
6. Fill liners 3/4 full and bake for 15-18 minutes or until an inserted knife comes out clean.
7. Frosting: Beat butter and cream cheese for 3 minutes. Add vanilla extract and slowly add powdered sugar until you reach your desired consistency. Add milk to thin out frosting if needed.
8. Ganache: Place chocolate chips in a heat proof bowl. Heat heavy cream on the stove top until bubbles form (not quite a boil). Pour over chocolate chips and whisk until smooth. Add honey and stir again. Let cool for 10 minutes.
9. Pipe buttercream onto cooled cupcakes and top with chocolate ganache and banana slices.