One-Bowl Banana Muffins with Sour Cream (Makes 6)

This is a reliable, one-bowl banana muffin recipe that delivers perfectly domed, bakery-style tops and rich banana flavor. These muffins bake up moist and tender thanks to the addition of sour cream, with a tender crumb that rivals your favorite bakery. The recipe is simple, uses common pantry ingredients, and can be made as jumbo muffins (about 6) or standard muffins (about 12).

Learn how to make bakery-style banana muffins at home.

Ingredients & substitutions for sour cream banana muffins

This easy muffin batter tastes like classic banana bread in muffin form. It’s mixed in one bowl and comes together quickly, making it ideal for busy mornings or beginner bakers.

All-purpose flour — You can replace up to half the flour with white whole wheat for a heartier texture.
Baking powder — This recipe relies on baking powder for rise; do not replace it with baking soda unless also adjusting acidic ingredients.
Salt — Balances the sweetness and enhances flavor.
Cinnamon — Optional: add 1/4 teaspoon nutmeg with the cinnamon for a warm spiced note.
Vegetable or neutral oil — Keeps muffins moist. Can substitute canola, grapeseed, or refined coconut oil.
Dark brown sugar — Adds moisture and a caramel-like flavor. Light brown sugar can be used if needed; avoid substituting with all white granulated sugar, which yields a drier texture.
Large eggs — Use room temperature eggs for best incorporation.
Whole milk — Any milk, including non-dairy, will work.
Full-fat sour cream — Adds moisture and tang. Substitute with full-fat Greek yogurt or crème fraîche if preferred.
Overripe mashed bananas — Use bananas heavily freckled or mottled with brown for best sweetness and moisture. Mash until almost liquid for the most tender crumb.

Ingredients needed to make banana muffins with sour cream.

Optional additions: fold in 1 cup chopped toasted walnuts for banana nut muffins, or add 3/4 to 1 cup chocolate chips for banana chocolate chip muffins. To toast nuts, spread chopped walnuts on a baking sheet at 350ºF for 5–10 minutes, stirring occasionally until fragrant and lightly browned.

Sour cream banana muffins in muffin tin.

How to make the best banana muffins

Step 1 — Prepare

Preheat the oven to 425ºF. Line a muffin tin with paper liners or lightly grease each cup. Use a standard 12-cup tin for regular muffins or a 6-cup jumbo tin for larger bakery-style muffins.

Step 2 — Combine wet ingredients

In a large bowl whisk together the oil, brown sugar, milk, and sour cream until smooth and any clumps of brown sugar are broken up. Add the eggs and whisk until fully incorporated.

Add vegetable oil to a large mixing bowl. — Add vegetable oil to a large mixing bowl

Add brown sugar to the oil. — Add brown sugar

Step 3 — Add banana

Stir in the mashed overripe bananas until evenly combined with the wet mixture.

Add mashed banana to the wet ingredients. — Add mashed banana

Step 4 — Fold in dry ingredients

Gently fold in the flour, baking powder, salt, and cinnamon with a wooden spoon or spatula just until no dry streaks remain. Do not overmix — overworking the batter produces tough muffins.

Add flour to the wet ingredients. — Add flour

Step 5 — Fill and bake

Fill each muffin cup almost to the top. For jumbo muffins this recipe yields about 6; for standard muffins it yields about 12.

Fill muffin cups almost to the top. — Fill muffin cups almost to the top

Step 6 — Temperature trick for a domed top

Bake at 425ºF for 7 minutes, then reduce the oven temperature to 350ºF for the remaining bake time: about 18–20 minutes for jumbo muffins or roughly 15 minutes for standard muffins. The initial high heat gives the muffins a quick rise and creates that bakery-style dome. Test for doneness with a toothpick — a few moist crumbs are fine.

Step 7 — Cool

Let the muffins cool in the pan for 10 minutes, then transfer to a wire rack to cool completely.

Fluffy inside of a jumbo banana muffin. — Moist and fluffy banana muffins with sour cream

Storage and freezing

Store cooled muffins at room temperature in an airtight container for up to 4 days, or refrigerate for up to one week. To freeze, wrap each muffin individually in plastic wrap or foil and place in a resealable freezer bag; freeze up to 3 months. Thaw at room temperature and warm briefly in the microwave if desired.

Pro tips

Start baking at a higher temperature for 7 minutes, then lower the heat to finish baking. This gives the best domed tops.
Full-fat sour cream (or Greek yogurt) plus oil and milk keeps the muffins tender and moist.
Fold dry ingredients in gently and stop as soon as there are no dry streaks to avoid a dense, chewy texture.

Variations and FAQs

Mini muffins: fill mini cups two-thirds full and follow the same temperature strategy; check for doneness sooner (start checking around 7–8 minutes after the initial blast).

Frozen bananas: freeze bananas whole in their peels when they are heavily speckled; thaw in the fridge and save any released liquid to add to the batter with the mashed fruit.

Use this batter for banana bread: this recipe is formulated for muffins; for best results, use a recipe designed specifically for banana bread if you want a loaf.