In a large bowl mash the bananas and all the wet ingredients in the bowl. Mix till evenly combined.
Fold in the dry ingredients until everything is evenly combined
In a small microwave safe bowl, melt the chocolate and the coconut oil in 20 second increments. Stir consistently until chocolate and smooth.
Pour half the banana bread batter in the loaf pan, and add half the chocolate. Gently swirl the chocolate into the banana bread batter.
Spoon the remaining batter over the chocolate and spread gently. Then add remaining chocolate over the top and swirl.
In a small bowl combine the crumble ingredients and stir until evenly mix
Sprinkle crumble over the batter and gently press down.
Place the pan in the oven and cook for about 35 minutes. Take out the bread and cover with foil for the remaining 15-25 so the crumble does not burn. Bread is done when a tester comes out clean.
Makes about 10 large slices. Store up to 4 days on the counter or freeze for up to 3 months
Notes
Nutritional facts calculated using lakanto monk fruit sweetener, medium bananas, and sugar free syrup