Chocolate Tahini Swirl Banana Bread with Sour Cream Twist

This chocolate tahini banana bread, made with sour cream and sprinkled with sesame seeds, bakes up incredibly soft and moist. The dramatic chocolate swirl inside makes each slice look special, and the recipe takes just 15 minutes of hands-on prep.

This loaf was inspired by a marble loaf technique and by a cinnamon crunch banana bread variation. The method here follows a creaming approach: butter and sugars are whipped until pale and airy, then combined with mashed bananas, sour cream and flour in alternating additions. Half the batter is folded with cocoa for the chocolate swirls while the other half is enriched with tahini for a gentle sesame flavor that pairs beautifully with chocolate.

Tell me about this recipe!

• The batter is made using the creaming method—butter and sugar are beaten until light, then dry ingredients and sour cream are added in three additions.
• Sour cream keeps the loaf tender and moist; you can substitute full-fat yogurt if preferred.
• Tahini (a sesame paste) adds a nutty, savory-sweet depth that complements the chocolate swirl.
• The top is finished with white and black sesame seeds for texture and visual contrast; ganache is an alternative topping if you prefer extra chocolate.

Ingredients Needed

The printable recipe card with the full ingredient list and instructions is below.

• Bananas: Use very ripe bananas with dark speckles for sweetness and easy mashing.
• Sour cream: Adds moisture and richness; full-fat yogurt can be used instead.
• Butter: European-style butter (higher butterfat) gives a richer, creamier texture.
• Cocoa powder: Mixed into half the batter to create the chocolate swirl and marbled appearance.
• Tahini: A toasted sesame paste that works well in sweet bakes and pairs wonderfully with chocolate.

How to make this recipe

Step 1: Preheat the oven to 350°F (175°C). Grease and line an 8.5 x 4.5 inch loaf pan.

Step 2: Mash the ripe bananas until mostly smooth; set aside.

Step 3: Whisk together the flour, baking soda and salt, then set the dry mix aside.

Step 4: Beat room-temperature butter until creamy, then add white and brown sugar and beat until pale and fluffy (about 2–3 minutes). Add vanilla, tahini and the egg, and mix until combined. On low speed, beat in the mashed bananas—some small lumps are fine.

Step 5: Add the dry ingredients in three additions, alternating with the sour cream, beginning and ending with the dry ingredients. Mix on low speed until just combined.

Step 6: Remove roughly half the batter into a separate bowl. Stir cocoa powder into the remaining batter until evenly incorporated to make the chocolate portion.

Step 7: Using an ice cream scoop or large spoon, deposit alternating scoops of plain and chocolate batter into the prepared loaf pan to form a checkerboard pattern. Repeat with a second layer.

Step 8: Swirl the batters gently with a butter knife using figure-8 motions—reach the bottom of the pan so the layers swirl through, but don’t overmix or the pattern will become muddy. Sprinkle with sesame seeds and bake at 350°F (175°C) for 55–65 minutes. A toothpick inserted into the center should come out with a few moist crumbs.

Recipe Tips

• Weigh ingredients by grams when possible—metric measurements give the most consistent results.
• Bring all ingredients (butter, egg, sour cream) to room temperature before starting to ensure even mixing.
• Use a light-colored metal loaf pan; dark pans can brown the sides too quickly.
• Allow the loaf to cool completely before slicing so it sets and doesn’t crumble.

Frequently Asked Questions

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