These soft and moist banana muffins are packed with chocolate chunks! They're made with brown butter, giving you so much flavor. Plus, you don't need a mixer to make these chocolate chunk banana muffins!
Preheat the oven to 425°Fahrenheit/218°Celsius and adjust the rack to be in the middle of the oven. Place 12 liners in 2 muffin pans, leaving every other muffin cavity empty.
Place the butter in a small saucepan and place over medium-low heat so the butter melts. Use a rubber spatula to stir until the butter begins to foam and sputter. You should start to see small white milk solids at the bottom of the pan. Once those turn a golden brown and the butter smells nutty and toasted, pour into a bowl and let cool for 10-15 minutes.
½ cup unsalted butter
In a small or medium bowl, whisk the flour with the salt, baking soda, baking powder and ground cinnamon. Set aside.
Pour both sugars into the cooled brown butter and whisk together.
½ cup light brown sugar, ½ cup granulated sugar
Whisk in the eggs, mashed bananas, sour cream, and vanilla extract.
1 ½ cups mashed bananas, 2 large eggs, ⅓ cup sour cream, 1 teaspoon vanilla extract
Pour the dry ingredients in and use a rubber spatula to fold together until just combined.
Stir in the chopped chocolate bar, but keep a few pieces to the side.
5 oz chocolate bar
Pour the banana muffin batter into your prepared liners to the top then sprinkle over the extra pieces of chopped chocoloate.
Bake in the preheated oven for 5 minutes, then lower the temperature (without opening the door) to 350/175 and bake for an extra 14-16 minutes. Let the muffins cool in the pan for 10 minutes before removing to a wire cooling rack to cool completely.
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Notes
My recipes have been developed and tested in metric grams. I highly recommend using a weighing scale and measuring out your ingredients the metric way. I have provided a conversion to US cups but please note that I haven't tested the recipe with this method. I make sure that all of my ingredients are at room temperature before I start the recipe, so pull out all of the ingredients about an hour or two before you start baking. Salt: If you don't have kosher salt, halve the amount of salt called for in the recipe. 1 teaspoon kosher salt = ½ teaspoon fine salt. I'm using Diamond Crystal Kosher Salt and not Morton Salt which is too salty for this! Sour Cream: if you don't have sour cream, use full-fat yogurt or Greek yogurt. Chocolate: use any type of chocolate you like, I've tested this recipe with semisweet and dark chocolate but you could also use milk or white chocolate. You can also swap out a chopped chocolate bar for chocolate chips. Storage: keep in an airtight container at room temperature for 2 days, or in the fridge for five days. Freezing: freeze baked and cooled muffins in a freezer bag. Let them thaw in the fridge or at room temperature.