Chocolate Banana Bread

Ingredients

Dry Ingredients

• 215g (1¾ cups) All-purpose flour
• 50g (½ cup) Unsweetened cocoa powder (Dutch-process preferred)
• 4g (2 tsp) Espresso powder
• 5g (1 tsp) Baking soda
• 3g (½ tsp) Fine sea salt
• 2g (½ tsp) Ground cinnamon (optional)

Wet Ingredients

• 4 medium (about 1½ cups mashed) Very ripe bananas
• 115g (½ cup (1 stick)) Unsalted butter
• 215g (1 cup packed, lightly heaped) Light brown sugar
• 2 whole (2 eggs) Large eggs
• 60g (¼ cup) Sour cream
• 30g (2 tbsp) Whole milk
• 5ml (1 tsp) Pure vanilla extract

Add-Ins

• 100g (½ cup) Semisweet or dark chocolate chips (recommended)
• 75g (¾ cup) Chopped walnuts (optional)
• 75g (¾ cup) Chopped pecans (optional)

Equipment

Method

Prep Work

Getting organized before you start makes everything go smoother. Chocolate batters move fast once the cocoa hits the wet, so set yourself up first.

1. Preheat oven. Set your oven to 350°F (175°C). Position a rack in the lower third of the oven. This keeps the top from setting before the center catches up.
2. Prepare the loaf pan. Grease a 9x5 inch loaf pan with butter or non-stick spray. Line the bottom and long sides with a strip of parchment, leaving an overhang on both sides like handles. Dark batters can stick, so don't skip this.
3. Bring ingredients to room temperature. Set out the butter, eggs, sour cream, and milk. Room temperature ingredients blend smoothly and trap more air when you cream the butter.

Tip: If your bananas aren't ripe enough, you can speed things up. Place unpeeled bananas on a baking sheet and bake at 300°F for 15-20 minutes until the skins are black and the fruit is soft. Cool before using.

Mix the Dry Ingredients

Cocoa clumps. A good whisk now saves you from chasing dry pockets later.

1. Sift if lumpy. If your cocoa powder is clumpy, sift it before measuring or push it through a fine mesh strainer into the bowl. Smooth cocoa means smooth crumb.
2. Combine dry ingredients. In a medium bowl, whisk together the flour, cocoa powder, espresso powder, baking soda, salt, and cinnamon until the color is even with no streaks of pale flour.
3. Set aside. Keep this bowl ready to add to the wet mixture later.

Tip: Use the spoon and level method for both the flour and the cocoa. Fluff, spoon into the cup, then level with a flat edge. Scooping packs in extra and dries out the loaf, and that matters even more now that you've already cut the flour to make room for cocoa.

Mash the Bananas

The riper the better. Black and ugly bananas are exactly what you want here.

1. Peel and mash. Peel the bananas into a bowl. Using a fork or potato masher, mash until mostly smooth with a few small chunks left for texture.
2. Measure if needed. You should have about 1½ cups of mashed banana. A little more or less is fine.

Tip: Cocoa mutes sweetness, so really ripe bananas pull double duty here, bringing both flavor and natural sugar.

Cream the Butter and Sugar

This step builds the structure that keeps a chocolate quick bread from baking up like a dense brick.

1. Beat butter and sugar. In a large bowl with a hand mixer, or a stand mixer with the paddle, beat the softened butter and brown sugar on medium-high until light and fluffy, about 3 minutes. It should look noticeably lighter in color.
2. Add eggs. Add the eggs one at a time, beating well after each. Scrape down the sides of the bowl as needed.
3. Add sour cream, milk, and vanilla. Beat in the sour cream, milk, and vanilla until combined. The milk gives the cocoa something extra to drink so the loaf stays moist.
4. Add mashed bananas. Mix in the mashed bananas on low until just combined. The mixture may look a little curdled. That's normal and it comes together once the dry goes in.

Tip: Don't rush the creaming. Those 3 minutes of beating create the air pockets that make the difference between tender bread and a heavy one, and cocoa makes a heavy loaf even heavier.

Combine Wet and Dry

Gentle hands from here on. Overmixing is the fastest way to a tough, gummy loaf.

1. Add dry to wet. Add the cocoa-flour mixture to the banana mixture all at once.
2. Fold gently. Using a rubber spatula, fold the dry into the wet with broad, gentle strokes. Scrape the bottom and sides of the bowl. The batter will be thick, dark, and almost mousse-like.
3. Stop when just combined. Mix only until you no longer see dry cocoa or flour. A few small lumps are fine. Do not overmix.
4. Fold in the chips. Add the chocolate chips, and the nuts if using, and fold them in with 2 or 3 more strokes. Hold back a small handful of chips to press into the top if you want them showing.

Tip: Count your folds if it helps. You should need no more than 15 to 20 total. The batter should look rough and thick, not smooth and pourable like cake batter.

Bake

A dark loaf hides its color cues, so lean on the toothpick and the clock instead of your eyes.

1. Fill the pan. Scrape the batter into the prepared pan. Smooth the top with a spatula and press in any reserved chips.
2. Optional topping. For crunch and a little shine, sprinkle a tablespoon of raw sugar or extra chips across the top before baking.
3. Set your oven. Confirm the oven is at 350°F (175°C) with the rack in the lower third.
4. Bake undisturbed. Bake for 55-65 minutes. Don't open the door for the first 45 minutes. Chocolate batters need that steady heat to set.
5. Check for doneness. Start checking at 55 minutes. A toothpick in the center should come out with a few moist crumbs and no wet batter. Melted chips can fake you out, so test in a spot between chips. Internal temperature should read 200-205°F (93-96°C).
6. Tent if needed. Cocoa browns fast. If the top is darkening before the center is set, tent loosely with foil for the last 15-20 minutes.

Tip: Quick breads crack on top, and that's a good sign of oven spring. With a dark loaf the crack should look fudgy and moist inside, not wet or raw.

Cool and Serve

Patience pays off. Cutting too soon gives you a gummy slice and lets the chips run.

1. Initial cooling. Let the bread cool in the pan on a wire rack for 15 minutes so the structure can set.
2. Remove from pan. Using the parchment handles, or by running a knife around the edges, lift the loaf out onto the wire rack.
3. Cool completely. Let it cool another 30-45 minutes before slicing. A warm chocolate loaf will smear instead of slice clean.
4. Slice and serve. Use a serrated knife for clean slices. Good plain, even better slightly warm with a little butter, and best the next day.

Tip: Chocolate banana bread tastes even deeper on day two. The cocoa rounds out and the banana settles in. Wrap it well overnight and you'll see.

Pan Options

This batter works in several pan sizes. The chips and cocoa hold moisture, so smaller pans need a careful center check.

Standard 9x5 Loaf (recommended)

1. Pour batter. Pour batter into greased 9x5 loaf pan. Smooth top with spatula.
2. Bake. Bake 55-65 minutes at 350°F.

8x4 Loaf Pan

1. Pour batter. Pour batter into smaller 8x4 loaf pan. Batter will mound higher in the pan.
2. Increase bake time. Increase baking time to 60-70 minutes. Check center carefully, smaller pans can trap moisture.

Mini Loaves

1. Divide batter. Divide batter among 3-4 mini loaf pans (5x3 inch). Fill each about ⅔ full.
2. Reduce bake time. Reduce baking time to 35-45 minutes. Great for gifting!

Muffins

1. Fill muffin cups. Line standard muffin tin with paper liners. Fill cups about ¾ full.
2. Bake. Bake 20-25 minutes at 350°F. Makes about 12 muffins.

Proof test: Insert a toothpick into the center. It should come out clean or with just a few moist crumbs. Wet batter means it needs more time. A completely clean toothpick on first check might mean it's slightly overbaked.

Baking Methods

Low and slow keeps a dark, chip-studded loaf moist all the way through.

Oven: 175°C / 350°F. Internal temperature when done: 93-96°C / 200-205°F.

Standard Oven (recommended)

Equipment: 9x5 loaf pan,Rack in lower third position

1. Preheat oven. Preheat oven to 350°F.
2. Position rack. Position rack in lower third of oven.
3. Bake. Bake 55-65 minutes. Tent with foil if browning too fast.
4. Test for doneness. Test with toothpick for doneness.

Convection Oven

Equipment: 9x5 loaf pan

1. Reduce temperature. Reduce temperature to 325°F (convection runs hotter).
2. Bake. Bake 50-55 minutes. Check 5-10 minutes earlier than standard time.
3. Watch carefully. May brown more evenly but watch carefully.

Storage

• Room temperature: Wrap tightly in plastic wrap or store in an airtight container at room temperature for up to 4 days. The bread actually tastes better on day 2 once the flavors have melded.
• Frozen: Wrap the whole loaf tightly in plastic wrap, then aluminum foil, then place in a freezer bag. Freeze for up to 3 months. You can also freeze individual slices for quick grab-and-go portions. Thaw overnight at room temperature or toast slices directly from frozen.

Frequently Asked Questions

Do I really need to reduce the flour when I add cocoa?

Yes. Cocoa powder is a dry ingredient and it's thirsty, soaking up more liquid than flour does by weight. If you add cocoa on top of the full flour amount, the loaf bakes up dry and heavy. Swapping out 35g of flour for the cocoa, and adding back a splash of milk, keeps the crumb tender.

Will the espresso powder make it taste like coffee?

No. At 2 teaspoons it works behind the scenes to deepen the chocolate so it tastes richer and more like chocolate. You can leave it out and the bread is still good, just a touch flatter in flavor.

Dutch-process or natural cocoa?

Either works here. Dutch-process gives a darker color and a smooth, mellow chocolate. Natural cocoa is lighter with a brighter, tangier edge. The banana and sour cream bring plenty of acid, so the baking soda fires either way and you don't need to change the leavening.

Can I skip the chips and keep it just cocoa?

You can. You'll get a clean, brownie-like chocolate loaf. The chips add melty pockets and a little extra sweetness to balance the cocoa, so most people keep them. Your call.

My chocolate version came out dry. What happened?

Two usual suspects. Either the flour wasn't reduced to make room for the cocoa, or the loaf went a few minutes too long. Start checking at 55 minutes and pull it when a toothpick shows moist crumbs, not clean and dry.

Can I use frozen bananas?

Yes. Thaw them completely and drain off the extra liquid that collects, or your batter will be too wet. Frozen and thawed bananas mash easily and are often extra sweet.

Can I substitute Greek yogurt for sour cream?

Yes. Full-fat plain Greek yogurt swaps in one for one and keeps the loaf moist. Skip nonfat, which can make the crumb rubbery.

How do I know when it's done?

A toothpick in the center, tested between chips, should come out with a few moist crumbs and no wet batter. Internal temperature should read 200-205°F. The top will be set and cracked, and the edges will pull slightly from the pan.

Nutrition

Per serving (1 slice (about 90g)): 325 calories, 45g carbohydrates, 5g protein, 14g fat, 3g fiber, 190mg sodium. Makes 12 servings.