Gluten-Free Banana Marble Loaves

Gluten-free Banana Marble LoafAlthough this was a last-minute idea to use up the rest of my slightly overripe bananas before they went bad, these gluten-free banana marble loaves turned out fantastic. It’s always fun to make  marble loaves, in this case, with alternating banana and dark chocolate. It offers you an inviting look, as well as an interesting varying flavor.   In each bite, you’ll enjoy the deep dark chocolate or the ripe banana, or sometimes both. No kidding! They are soft and moist, vegan, and gluten-free marble loaves.

When I saw bananas at the grocery store for 29 ¢ per pound, I just couldn’t help picking up a big bunch. Yes, it was per pound, not each. Whenever I get a good deal on bananas, I often end up with a few overripe ones. So that gets me to continuously create and develop good banana recipes, such as the banana oatmeal quinoa pancakes, the ultimate banana chocolate cake, and the classic banana mini loaf, et al. (they’re all gluten-free and vegan).

I like the fruity and fresh flavor of a ripe yellow banana when eaten by itself. However, riper and softer bananas with some brown spots on the peeling are best for baking.   Too green means the banana flesh is not ripe enough and tastes starchy, while too dark with too many black and brown spots means it’s overripe and too sweet. It also starts to become mushy and lose its fresh and fruity taste as well.Gluten-free Banana Marble Loaf-01

Why the green and yellow banana taste so different?

During the ripening process, bananas produce ethylene, a chemical that helps to ripen the banana itself. Ethylene also stimulates the amylase and results in starch converting to sugar, such as fructose and glucose. Studies show that the riper the banana, the less starch it contains. Unripe green bananas contain approximately 82% starch and 7% sugar, while a ripe yellow banana contains 26% starch and 63% sugar. For the overripe black banana the starch and sugar are 3% and 88%, respectively.

Gluten-Free Banana Marble Loaf


Natural sugar content in bananas is great in vegan and gluten-free baking, in this case, the marble loaves.

It’s challenging to bake with gluten-free flour, due to the loss of the sticky and stretchy gluten that holds the pastries together. Adding sugar to pastries helps this situation. However, I normally don’t add sugar into my gluten-free pastries. Adding ripe bananas with their natural sugar content to the gluten-free dough helps to sweeten the pastries, as well as add that stickiness that helps to hold the loaf together (not be crumbly). These simple, yeast free banana marble loaves are great for breakfast, especially with chocolate butter spread on top.

Gluten-Free Banana Marble Loaf

4.5 from 2 votes
Gluten-Free Banana Marble Loaf
Prep Time
20 mins
Cook Time
40 mins
Total Time
1 hr
These soft and moist, vegan and gluten-free banana marble loaves offer you an inviting look, as well as an interesting varying flavor. 
Course: Breakfast
Cuisine: American
Keyword: Gluten-free, gluten-free baking, gluten-free bread, gluten-free vegan, vegan
Servings: 3 mini loaves
Author: Joyce @ Light Orange Bean
  • 2-1/2 cup all-purpose gluten-free flour see note
  • ½ tbs baking powder
  • ½ tsp baking soda
  • ¼ tsp salt
  • ½ tsp pure stevia extract powder Now brand
  • ¼ cup special dark cocoa powder Hershey brand
  • 3 ripe bananas
  • 1 tbs distilled white vinegar
  • 1 tsp vanilla extract
  • 1 cup non-dairy milk I used Silk brand unsweetened almond milk
  • 1/3 cup canola oil
  1. Preheat oven at 350 °F. Lightly spray three mini loaf pans with oil.
  2. In a large mixing bowl, whisk together all dry ingredients except the coca powder. Transfer 3/4 cup of the mixed dry ingredients into another mixing bowl. Mix in cocoa powder with the ¾ cup flour mixture. Set both bowls aside.
  3. In a food processor, blend banana until smooth. Transfer the banana into a mixing bowl and then add the rest of wet ingredients. Mix thoroughly.
  4. Pour approximately half of the wet mixture into each flour mixture. Use spatulas to mix the wet and dry ingredients together until just combined. Place a scoop of the chocolate batter followed by a scoop of the banana batter (the one without cocoa power), alternating between the two to get the marbling, into the prepared loaf pans.
  5. After filling the loaf pan, tap the loaf pan on the counter gently to ensure there are no gaps or air pockets in the batter. Stick a paring knife or butter knife vertically into the dough and move it around through the dough to create the marble look.
  6. Bake for 40 minutes. Allow the loaf to cool in the pan for 3 minutes, until it can be removed from the pan easily. Cool completely on a wire cooling rack before slicing.
Recipe Notes

For homemade gluten-free all-purpose flour (yield 40 oz all-purpose gluten-free flour)
8 oz brown rice flour
8 oz millet flour
8 oz sweet rice flour
8 oz white rice flour
4 oz cornstarch
4 oz potato starch
Mix all flour well in a container or a gallon zip-lock bag. Store in freezer.


Gluten-free Banana Marble Loaves

Gluten-Free Banana Marble Loaves


  1. Ruby says:

    Loved this recipe. I didn’t have enough bananas so used 3 pears plus one 1/2 ripe banana.. My marbling effect didn’t turn out as pretty as yours though.. The chocolate mix was much denser and didn’t spread as well as the fruit dough mix did. My layers were fine, just my marbling effect looked “muddy”.. but still tasty 🙂

  2. Stefanie says:

    We don’t use cups here in belgium, i can find conversions for all your ingredients except for your specific gluten free flour blend of course… could you maybe help me with this?
    And how much honey or maple syrup would you say could substitute for the stevia? It’s really hard to find…
    Thanks in advance!

    • Joyce says:

      Thanks for stopping by, Stefanie! I understand the measurement using cups seems not very universal so I have another post about how to make gluten-free flour mix. You can refer to that post for it. I use weight (grams) to measure it. The link is

      About honey or maple syrup, because it’s liquid, it’s hard to tell how much exactly to replace the stevia. For the sweetness, I normally replace 1/2 cup sugar/honey/maple syrup with 1/2 teaspoon pure stevia extract powder. Again, because it’s liquid, it will change the consistency of the batter. You need to adjust the amount of liquid you add in it. I hope these answers help. Let me know if you have more questions. 🙂

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