Preheat the oven to 350 F.
Prepare 8 ⅕ x 4 ⅕ inch loaf pan and line it with parchment paper.
Wet ingredients: In a large bowl, beat together butter, eggs, dark brown sugar, orange juice, and lemon juice. Set aside.
Dry ingredients: Add quinoa and green banana flours, baking soda and sea salt together in a bowl. Mix.
Add dry ingredients to the bowl with the wet ingredients and mix well.
Fold in chocolate chips.
Pour the mixture into the prepared pan and bake until loaf is dark brown and skewer inserted in center comes out clean, 40 to 45 minutes, rotating pan halfway through baking.
Cool in pan for 10 minutes, then transfer to wire rack and cool at least 30 minutes before serving.