Preheat oven to 350º. Grease two 8” x 4” loaf pans and set aside.
In a large mixing bowl, blend together flours, xanthan gum, baking powder, baking soda, cinnamon and salt. Set aside.
Using your mixer: Beat sugar and butter on medium-high for 2 minutes. Add eggs and beat for another minute. Add peeled bananas, buttermilk and lemon juice and beat on medium until bananas are broken down. Stir in flour mixture until well combined.
Stir in cacao nibs and chocolate chips.
Divide batter between the two greased pans. Sprinkle ¼ cup of Bits’o Brickle Toffee Bits evenly, on top of each loaf.
Bake 40-45 minutes; until toothpick inserted in the center comes out clean.
Cool on wire rack for 10 minutes. Remove from pans and let cool on wire rack.