Irresistible Sourdough Discard Banana Muffins

Let’s be honest – finding ways to use up sourdough discard can feel like a never-ending puzzle. Between daily feedings and regular bakes, most of us end up with jars of discard taking up precious space in our fridges, and it seems wasteful to just throw it away.

That’s where these sourdough discard banana muffins come to the rescue: they’re quick to whip up, taste better than regular banana muffins, and help you put that extra discard to good use. Plus, they’re perfect for using up those overripe bananas that always seem to appear on the counter.

What Kind of Bananas Should I Use?

For these muffins, you’ll want to use bananas that are well past their prime – we’re talking dark brown, spotty ones that you might otherwise think about tossing out. These overripe bananas are actually perfect for baking because they’re sweeter and more flavorful than their yellow counterparts. If your bananas aren’t quite ripe enough, you can speed up the process by placing them in a paper bag with an apple for a day or two. When mashing your bananas, don’t worry about getting them completely smooth – a few small lumps will add nice texture to your muffins and remind everyone they’re eating real banana bread, not artificially flavored stuff.

Options for Substitutions

Let’s talk about ways to switch things up in these muffins while keeping them just as tasty:

• Sourdough discard: This is pretty important for the recipe’s texture and flavor, but if you’re in a pinch, you can use 1/2 cup of plain yogurt or buttermilk instead. Keep in mind you’ll lose that special sourdough taste though!
• Dark brown sugar: Light brown sugar works fine here, or try coconut sugar for a different flavor. Regular white sugar works too, but you’ll miss out on that nice caramel note.
• Sour cream: Plain yogurt, Greek yogurt, or buttermilk are perfect swaps. Even mashed avocado can work if you’re after a dairy-free option.
• Walnuts: Not a walnut fan? Try pecans, almonds, or even chocolate chips. You can also skip them completely if you prefer nut-free muffins.
• Butter: Feel free to use oil instead – coconut oil or vegetable oil both work well, using the same amount. For dairy-free needs, melted coconut oil is your best bet.
• Plain flour: While all-purpose flour is ideal, you can use whole wheat flour for up to half the amount. Just note that this will make your muffins a bit denser.

Watch Out for These Mistakes While Baking

The biggest mistake when making sourdough discard banana muffins is using bananas that aren’t ripe enough – they should be very spotty and almost black for the best flavor and natural sweetness. A common error is overmixing the batter once you’ve added the flour, which can lead to dense, tough muffins – instead, fold the dry ingredients gently until just combined, and don’t worry about a few small lumps. To get the most out of your sourdough discard, make sure it’s at room temperature before mixing it in, as cold discard doesn’t incorporate as smoothly and can affect the texture of your muffins. For the perfect dome-topped muffins, start baking at a higher temperature (425°F) for the first 5 minutes, then reduce to 350°F for the remaining time – this initial blast of heat helps create that bakery-style rise.

What to Serve With Banana Muffins?

These sourdough banana muffins make a perfect breakfast or afternoon snack, and there are lots of tasty ways to serve them! A simple spread of salted butter is always great, but you could also try them with a dollop of cream cheese or a drizzle of local honey. For breakfast, pair them with some fresh fruit and a hot cup of coffee or tea – I especially love them alongside crispy bacon for a sweet and salty combo. If you’re serving these for an afternoon treat, try warming them slightly and adding a scoop of vanilla ice cream on the side for an extra special touch.

Storage Instructions

Counter Storage: These sourdough banana muffins stay fresh at room temperature for up to 3 days. Just keep them in an airtight container and place them in a cool, dry spot. I like to line the container with paper towels to absorb any excess moisture and keep the muffins from getting too dense.

Refrigerate: Want them to last longer? Pop your muffins in the fridge in a sealed container, and they’ll stay good for up to a week. The paper towel trick works great here too – it helps maintain that perfect muffin texture we all love.

Freeze: These muffins are perfect for freezing! Once they’re completely cool, wrap them individually in plastic wrap and store them in a freezer bag for up to 3 months. When you’re craving one, just take it out the night before and let it thaw in the fridge, or give it a quick 20-30 second zap in the microwave.

Preparation Time	15-20 minutes
Cooking Time	20-25 minutes
Total Time	35-45 minutes
Level of Difficulty	Easy

Estimated Nutrition

Estimated nutrition for the whole recipe (without optional ingredients):

• Calories: 2200-2500
• Protein: 30-40 g
• Fat: 120-140 g
• Carbohydrates: 300-320 g

Ingredients

For the muffins:

• 3 tbsp sour cream (full-fat for richness)
• 1/2 cup unsalted butter
• 2/3 cup chopped walnuts (roughly chopped)
• 2 tsp baking powder
• 1/2 tsp baking soda
• 3 very ripe bananas (mashed well with a fork)
• 1/2 cup sourdough starter discard (unfed, straight from the fridge)
• 2 large eggs (room temperature for better emulsification)
• 1 cup dark brown sugar
• 1 tsp sea salt
• 2 cups all-purpose flour
• 1 tsp vanilla extract (I use Nielsen-Massey vanilla extract)

For the topping:

• 1/3 cup chopped walnuts

Step 1: Prepare the Oven and Muffin Tin

Preheat your oven to 350°F (176°C).

While the oven is heating up, prepare a 12-count muffin tin by lining it with paper liners or lightly greasing each cup to prevent sticking.

This will ensure your muffins come out easily once baked.

Step 2: Mix Dry Ingredients

In a mixing bowl, whisk together the flour, salt, baking powder, and baking soda.

Make sure these dry ingredients are thoroughly combined to ensure even distribution in the muffins.

Set this bowl aside for later use.

Step 3: Prepare the Mashed Bananas

Using a separate bowl, mash the bananas with a fork until they are smooth and free of lumps.

This will provide the banana flavor and moisture the muffins need.

Set aside once mashed.

Step 4: Combine Wet Ingredients

In a large mixing bowl, melt the butter and then add the dark brown sugar.

Using a spatula, cream the butter and sugar together until they’re well combined and smooth.

Next, add the eggs, mashed bananas, sour cream, sourdough discard, and vanilla extract.

Mix everything together until well incorporated.

Step 5: Combine Wet and Dry Ingredients

Add the bowl of wet ingredients to the bowl of dry ingredients.

Use a spatula to mix until just combined, being careful not to overmix.

Gently fold in 2/3 cup of the chopped walnuts to add a delightful crunch to your muffins.

Step 6: Fill Muffin Tin and Bake

Divide the muffin batter evenly among the prepared muffin cups.

Sprinkle the remaining 1/3 cup of chopped walnuts on top of each muffin for extra texture and flavor.

Place the muffin tin in the preheated oven and bake for 20-25 minutes, or until a toothpick inserted into the center of a muffin comes out clean.

Step 7: Cool and Enjoy

Once baked, remove the muffins from the oven and transfer them to a cooling rack.

Allow them to cool slightly before serving.

Enjoy your homemade banana walnut muffins as a delicious snack or breakfast treat!