Double Chocolate Banana Muffins

Watch the Full Step-by-Step
- Large mixing bowl
- Muffin tins
- Food processor
- Wire rack
INGREDIENTS
- 2½ cups/300 grams all-purpose or spelt flour
- 4 large ripe bananas, mashed
- ½ cup/120 grams olive oil
- 3 large eggs
- 1 teaspoon vanilla extract
- ½ cup + 1 tablespoon/120 grams sugar
- ½ teaspoon baking soda
- ½ teaspoon baking powder
- 1 cup/170 grams dark chocolate, chopped
- 1 cup/170 grams milk chocolate, chopped
- ⅔ cup/70 grams walnuts, chopped
- 1 teaspoon ground cinnamon, optional
- 3 ounces/90 grams Nutella, for filling
Crumble:
- 1.8 ounces/50 grams cold unsalted butter, cubed
- ⅓ cup/50 grams all-purpose flour
- ½ cup walnuts, chopped
- ¼ cup light brown sugar
- ½ teaspoon ground cinnamon
INSTRUCTIONS
- Preheat the oven to 350°F/175°C. Line muffin tins with paper liners.
- Mash bananas in a large bowl. Whisk in oil, eggs, vanilla, and sugar until smooth. Fold in flour, baking soda, baking powder, cinnamon, dark chocolate, milk chocolate, and walnuts until just combined.
- For the crumble, pulse butter, flour, walnuts, brown sugar, and cinnamon in a food processor until coarse crumbs form.
- Spoon batter into muffin cups, filling about two-thirds full. Press 1 teaspoon Nutella into the center of each, then sprinkle crumble on top.
- Bake until golden and a skewer comes out clean, 30–35 minutes. Cool in pan for 10 minutes, then transfer to a wire rack.

FAQ
What is the best way to store double chocolate banana muffins?
Start by allowing them to cool completely at room temperature. Storing them while still warm can create condensation, which leads to soggy muffins. Once cooled, place them in an airtight container to prevent exposure to air, which can dry them out. If you plan to consume them within two to three days, keeping them at room temperature in a cool, dry location is sufficient.
For longer storage, you can freeze double chocolate banana muffins individually wrapped in plastic wrap or aluminum foil and then placed in a freezer-safe container or bag. When ready to eat, thaw them at room temperature or warm them in the oven for a few minutes to restore softness. Avoid refrigeration unless necessary, as it can dry the muffins more quickly.
Why are my double chocolate banana muffins sometimes dry?
Double chocolate banana muffins can become dry if the balance of wet and dry ingredients is off, or if they are overbaked. Using overly ripe bananas helps maintain moisture, as does incorporating enough oil or melted butter. Avoid overmixing the batter, because excessive gluten development can lead to a dense, dry crumb.
Check your oven temperature, as ovens that run too hot can bake the exterior faster than the interior, drying out the muffins. Baking time should be closely monitored, testing doneness with a skewer. Storing muffins in an airtight container at room temperature also helps retain moisture.
Can I freeze the baked muffins?
After baking, allow the muffins to cool completely to room temperature to prevent condensation, which can lead to sogginess. Wrap each muffin individually in plastic wrap or aluminum foil, then place them in a freezer-safe bag or airtight container to protect against freezer burn.
They can be stored for up to three months. When ready to eat, thaw muffins at room temperature or gently warm them in the oven for 5–10 minutes at 325°F/160°C to revive softness and melt the chocolate slightly.

How can I make double chocolate banana muffins extra moist?
Focus on the balance of wet and dry ingredients and the handling of the batter. Use ripe bananas, as they add natural moisture and sweetness. Incorporating oil or melted butter instead of only eggs or butter provides additional tenderness. Avoid overmixing the batter when combining the wet and dry ingredients because overmixing develops gluten, which can result in dense or tough muffins.
Gently fold in the chopped chocolate and walnuts at the end to prevent breaking up the air pockets formed during mixing. Including a small amount of yogurt or sour cream can enhance moisture and improve texture without altering the flavor. Baking at the correct oven temperature is essential: too hot can overcook the edges before the center is set, and too low can cause sinking. Using an oven thermometer ensures accuracy. The crumble topping should be added just before baking.
Why did my double chocolate banana muffins sink in the middle?
Muffins may sink in the middle due to several factors related to batter composition, mixing, and baking conditions. Overmixing the batter can incorporate too much air and develop excess gluten, causing the muffins to rise quickly in the oven and then collapse as they cool. Using overly ripe bananas or too much liquid without adjusting dry ingredients can create a heavy batter that struggles to support its structure.
Incorrect oven temperature is another common reason: if the oven is too low, muffins may rise slowly and then sink before the center sets; if it is too high, the outside can cook faster than the inside, leading to a collapse. Underbaking is also a cause; the center needs to reach a temperature high enough to set properly. Always preheat the oven and consider checking muffin doneness with a skewer or toothpick before the recommended baking time ends.
How do I prevent the chocolate from sinking to the bottom?
Coat the chopped chocolate lightly in a small amount of flour before folding it into the batter. This creates a barrier and helps suspend the chocolate evenly throughout the muffin. Gently fold in the chocolate rather than stirring vigorously, as overmixing can cause it to sink.
Ensure the batter is not too thin; overly wet batters make it harder for the chocolate to stay suspended. Distribute the batter evenly in muffin cups to prevent pooling. Baking at the correct temperature is essential: a properly preheated oven sets the batter quickly, helping hold the chocolate in place.

Can I use frozen bananas to make double chocolate banana muffins?
Yes, frozen bananas often make the muffins extra sweet and moist. Thaw the bananas completely at room temperature or in the refrigerator, then drain any excess liquid to prevent the batter from becoming too watery. Mash them thoroughly to create a smooth consistency.
Using frozen bananas may slightly alter the texture of the muffins, but they generally retain the same soft, tender crumb. The natural sugars concentrate during freezing, which enhances the overall sweetness and flavor. Adjust sugar slightly if your frozen bananas are particularly sweet.
What is the best way to reheat double chocolate banana muffins?
The best way to reheat double chocolate banana muffins is gently to restore warmth and maintain moisture without drying them out. For a single muffin, place it in the microwave for 15 to 20 seconds on medium power; check for softness and heat, adding an extra 5 to 10 seconds if needed.
For multiple muffins, wrap them in foil and warm in a preheated oven at 325°F/160°C for 8 to 12 minutes. This method ensures the interior warms evenly while keeping the outside soft and the chocolate slightly melty. Avoid microwaving too long, as it can make the muffins tough or dry.
Can I make double chocolate banana muffins with whole wheat flour?
Whole wheat flour absorbs more liquid than all-purpose, so you may need to slightly increase the amount of wet ingredients, such as mashed bananas, eggs, or oil, to maintain moisture. Using finely ground whole wheat flour or white whole wheat flour helps reduce the heavier texture sometimes associated with traditional whole wheat.
Mixing the batter gently is important, as overmixing can create dense muffins due to the higher gluten content in whole wheat. Baking time may be slightly longer, so check doneness with a skewer. The flavor will have a subtle nutty depth, complementing the chocolate and Nutella centers in double chocolate banana muffins.

What is the ideal banana ripeness for double chocolate banana muffins?
The ideal banana ripeness for double chocolate banana muffins is very ripe, with skins heavily spotted or even mostly brown. Overripe bananas are sweeter and softer, providing natural sugars and moisture that improve muffin texture and flavor.
Firm or barely ripe bananas will not mash as easily, and their lower sugar content may result in drier, less flavorful muffins. Using very ripe bananas also allows you to reduce added sugar slightly without affecting taste. Mash bananas thoroughly to ensure a smooth batter and even distribution of sweetness.
Can I use alternative sweeteners?
Yes, alternative sweeteners such as coconut sugar, maple syrup, or honey can be used in double chocolate banana muffins, but adjustments are necessary. For granulated substitutes like coconut sugar, measure one-to-one and ensure it is well incorporated. For liquid sweeteners like honey or maple syrup, reduce other liquids slightly, such as milk or oil, to prevent overly wet batter.
Using these alternatives may change the color and flavor slightly; for example, coconut sugar adds a subtle caramel note, while maple syrup imparts a mild, distinct sweetness. Baking time may also vary slightly, so check muffins early to avoid overbaking.
How can I make double chocolate banana muffins gluten-free?
substitute the all-purpose or spelt flour with a high-quality gluten-free flour blend designed for baking. Look for blends that contain xanthan gum or guar gum, which help provide structure and elasticity in place of gluten. Measure the flour accurately and avoid overmixing the batter, as gluten-free flours can be more sensitive and can become dense if handled too much.
Baking time may need slight adjustment; check muffins with a skewer for doneness. Be aware that texture may be slightly different, with a tender crumb rather than the traditional structure.
How can I make double chocolate banana muffins dairy-free and vegan?
Replace eggs with flax or chia “eggs,” mixing one tablespoon of ground flaxseed or chia seeds with three tablespoons of water per egg, letting it sit for 5–10 minutes until gelled. Use plant-based milk such as almond, oat, or soy milk, and replace any butter with coconut oil or a vegan butter substitute.
Swap traditional chocolate for dairy-free or vegan chocolate chips, and ensure the Nutella or chocolate spread used is vegan. Mix the batter gently to maintain airiness and follow the usual baking temperature, checking for doneness with a skewer.
