Spinach Banana Sourdough Muffins

5 from 4 votes
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We’ve been making Sweet Spinach Banana Muffins for years, and they’re always a hit. These Spinach Banana Sourdough Muffins are based on my original recipe but with the added benefits and flavor of sourdough discard! My kids love them as a quick breakfast or easy snack, and I love that they are packed with nutrients.

A close up shows a pile of spinach banana muffins on a plate.

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Why You’ll Love Spinach Banana Sourdough Muffins

  • Kid Friendly – Just like my Cinnamon Sugar Sourdough Muffins, these spinach banana muffins are a kid-friendly recipe that your whole family will love.
  • Discard Recipe – Adding sourdough discard to these muffins gives them a great texture and mild tang (if you want). If you’re looking for another banana muffin recipe that incorporates sourdough discard, try these Sourdough Banana Muffins.
  • Nutritious – These muffins are packed with spinach and whole wheat flour, making them not only delicious and nutritious! And if you want more healthy muffin recipes – you need to try my Sourdough Discard Bran Muffins or my Sourdough Zucchini Muffins too!

Sourdough Discard Tip: I keep a jar in my fridge that I continually add sourdough discard to. Discard is a by-product of your sourdough starter and there is no reason to throw it away. Instead, use it in incredible sourdough discard recipes where it adds moisture and great flavor. Use older, more tangy discard in savory recipes like these flaky sourdough biscuits and young/fresh discard in sweeter recipes like my favorite sourdough sugar cookie bars.

Important Ingredients

Ingredients are on a countertop, including ripe bananas, sourdough discard, flour, baking powder, baking soda, salt, eggs, milk, coconut oil, vanilla, greek yogurt, sugar, and spinach.
  • Sourdough Discard: You can use fresh, bubbly sourdough starter or sourdough discard in this recipe. If you don’t mind a more pronounced sourdough flavor, use refrigerated discard up to a week or two old.  I always use 100% hydration sourdough discard.
  • Bananas  Brown/black bananas have the most sugar, sweetness and banana flavor in them. Use black/brown bananas you have for the best banana muffins.
  • Spinach – Fresh spinach works best in this recipe and produces the vibrant green color that your kids will love!
  • Flour: I often use freshly milled whole wheat flour in this recipe. You can also use all-purpose flour.

See the recipe card for full information on ingredients and quantities

Substitutions

  • Sourdough Discard: Bubbly, active sourdough starter can be added in place of the discard in this recipe.
  • Coconut Oil: Any neutral flavored oil can be substituted. You don’t taste coconut flavor, it just makes the muffins soft and tender. Use it in a liquid state.
  • Spinach: I’ve always used fresh spinach for the bright green flavor. I have not tried frozen spinach and if you used it you would want to adjust for more liquid in the batter by adding a little more flour.
  • Greek Yogurt/Milk: This combination can be replaced with buttermilk if desired.

How to Make Spinach Banana Sourdough Muffins

Mix the Batter

A blender is shown in two pictures, one of which has spinach and other ingredients and the second shows the same ingredients after being blended until smooth.

Step 1: Use a large blender to combine bananas, eggs, Greek yogurt, milk, sugar, sourdough discard, vanilla extract, liquid coconut oil and spinach (Image 1). Blend on high until the mixture is smooth and creamy (Image 2).

A bowl of dry ingredients sits next to a blender and the contents of the blender are poured into the bowl of dry ingredients.

Step 2: Whisk together dry ingredients in a separate bowl (Image 3). Pour the spinach-banana mixture into the bowl of dry ingredients (Image 4).

A spoon stirs the wet and dry ingredients together in a bowl on the countertop.

Step 3: Gently stir batter until only a few dry streaks remain (Images 5 & 6). These muffins will turn out best if you don’t over-mix the batter.

Note: I always use fresh spinach in these muffins. If you substitute with frozen spinach, you’ll need to account for the change in water content by adding a little more flour.

Prepare Muffin Tins

A hand holds a scoop with muffin batter over a half-filled muffin tin.

Step 4: Fill a greased muffin tin with prepared batter. I like to use this extra large cookie scoop for scooping muffin batter (Images 7 & 8).

Bake

Muffins are fully baked in a muffin tin.

Step 5: Bake sourdough discard spinach muffins for 16-18 minutes at 375ºF. You’ll know your muffins are fully baked when you insert a toothpick in the middle of a muffin and it comes out clean (Image 9). Enjoy!

How to Store Leftovers

Leftover sourdough muffins can be kept at room temperature in an airtight container for a few days. For best results, freeze muffins in a freezer-safe bag or airtight container. Microwave for about 30 seconds straight from the freezer or thaw to enjoy!

Amy’s Recipe Tip

Freeze Ripe Bananas: When I have ripe bananas, and I’m not ready to make banana muffins, I stick them in a ziplock bag in the freezer. Pull them out to defrost and blot any excess liquid before mashing for your muffins.

Frequently Asked Questions

Do these muffins stay bright green?

Yes! Blending the spinach into the batter keeps these muffins bright green. They are perfect for a fun lunch or a St. Patrick’s Day celebration!

Can you taste the spinach or sourdough in these muffins?

These muffins have a slightly sweet banana flavor. You do not taste the spinach. If you use a younger and fresher sourdough discard, then you also won’t taste the sourdough flavor.

I don’t have Sourdough Discard. Can I still make these muffins?

Yes. Check out my recipe for Spinach Banana Muffins.

A close up shows a sourdough muffin cut in half sitting on top of a bowl of sourdough spinach muffins.

Sourdough Muffin Recipes You’ll Love

If you tried these Spinach Banana Sourdough Muffins or any other recipe on my website leave a 🌟 star rating and let me know how it went in the comments below. Happy Baking!

5 from 4 votes

Spinach Banana Sourdough Muffins

Sweet and vibrant, these spinach banana muffins use sourdough discard for a delicious way to use up extra sourdough discard. Packed with nearly a bag of spinach (without the taste), they are naturally bright green and have a sweet banana flavor!
Prep: 20 minutes
Cook: 18 minutes
Total: 38 minutes
Servings: 24 muffins

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Equipment

Ingredients 

  • 3 large bananas, about 390 grams, ripe/brown/black bananas preferred
  • 2 large eggs, about 100 grams
  • 90 grams Greek yogurt, heaping 1/3 cup
  • 90 grams milk (whole or 2%), heaping 1/3 cup
  • 150 grams granulated sugar, about 3/4 cup, see recipe notes (200 grams for a sweeter muffin)
  • 120 grams sourdough discard, about 1/2 cup
  • 8 grams vanilla extract, about 2 teaspoons
  • 55 grams coconut oil, liquid, about 1/4 cup, see recipe notes
  • 175 grams fresh spinach, about 6 oz, about 2.5 cups
  • 390 grams all-purpose or whole wheat flour, see recipe notes, about 3 cups
  • 10 grams baking powder, about 2 teaspoons
  • 5 grams baking soda, about 1 teaspoon
  • 10 grams salt, about 1 1/2 teaspoons

Instructions 

  • Preheat the oven to 375ºF. Spray two muffin tins with cooking spray or line with paper liners.
  • To a large blender add the bananas, eggs, Greek yogurt, milk, sugar, sourdough discard, vanilla extract, liquid coconut oil and spinach. Blend on high for 30 seconds to a minute until the mixture is smooth and creamy.
  • To a large bowl, whisk together the flour, baking powder, baking soda and salt.
  • Pour the spinach banana liquid into the flour mixture and gently combine with a large spoon. Stir until only a few streaks of flour mixture remain (be careful not to over-mix).
  • Fill each muffin tin about half full (about 1/4 cup batter per muffin tin) until all 24 tins are filled.
  • Bake for 16-18 minutes until muffins are baked all the way through. Stick a toothpick in the middle of a muffin. If it comes out clean, the muffins are ready. If a little wet batter is stuck to the toothpick, the muffins need a few minutes longer.
  • Let the muffins cool for 5-10 minutes and then remove from the muffin tins to a cooling rack. Enjoy!

Notes

Blender: Use a large blender or work in batches to make the spinach-banana mixture. This recipe has almost a whole bag of spinach to stuff into the blender, so it will initially take up some space. You can add handfuls of spinach to the blender if it doesn’t all fit at the beginning.
Sourdough Discard: Use 100% hydration sourdough discard. For less tang, use fresh discard or active sourdough starter. For more tang, use discard that’s been sitting in the refrigerator for up to a week.
Yogurt: If you don’t have Greek Yogurt, you can substitute plain (or even flavored if you like the flavor) yogurt or sour cream.
Coconut Oil: Substitute any neutral-flavored oil for the coconut oil. I’ve also had success substituting applesauce for the coconut oil.
Brown Bananas: These banana muffins work best with brown or black bananas for sweet banana flavor. They also work with frozen bananas that are thawed and blotted of excess moisture. I often freeze my brown/black bananas and pull them out when I have enough to make this recipe.
Sugar: These muffins do not taste overly sweet. If you prefer a sweeter muffin, make sure to use brown/black bananas and increase the sugar in the recipe to 1 cup or 200 grams.
Whole Wheat Flour: This recipe is delicious with whole wheat flour. I recommend using a soft white wheat berry or flour, but any whole wheat should work well. I mill mine in my Harvest Grain Mill and use equal amounts of whole wheat flour. The muffins may come out a little bit flatter, but they taste incredibly delicious! You can also substitute half whole wheat for half of the all-purpose flour.

Nutrition

Calories: 135kcal, Carbohydrates: 24g, Protein: 3g, Fat: 3g, Saturated Fat: 2g, Polyunsaturated Fat: 0.2g, Monounsaturated Fat: 0.3g, Trans Fat: 0.002g, Cholesterol: 16mg, Sodium: 278mg, Potassium: 136mg, Fiber: 1g, Sugar: 9g, Vitamin A: 723IU, Vitamin C: 4mg, Calcium: 46mg, Iron: 1mg

Nutrition information is automatically calculated, so should only be used as an approximation.

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About Amy Coyne

Hi! I'm Amy. Sourdough lover and Kentucky based mama, sharing my best recipes and tips, one bake at a time. So glad you're here!

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23 Comments

  1. Catherine says:

    Is it possible to make bake this in a loaf pan (9×5 ) to make a quick bread? We love all the recipes that we have tried on your website!