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Overhead view of a bakery style banana walnut muffin sweetened with maple syrup in a brown parchment wrapper

Banana Muffins with Sour Cream and Maple Syrup

These banana muffins with sour cream are bakery-style tall, sweetened with pure maple syrup, and loaded with walnuts.
Prep Time 10 minutes
Cook Time 22 minutes
Cool Time 15 minutes
Serving Size 6 Jumbo Muffins

Ingredients

Wet Ingredients

  • cups mashed very ripe bananas 3–4 bananas
  • ½ cup pure maple syrup Grade A Dark Robust recommended
  • ½ cup neutral oil avocado oil recommended
  • 2 large eggs room temperature
  • 1 teaspoon vanilla extract
  • ½ cup full-fat sour cream or full-fat Greek yogurt

Dry Ingredients

  • 2 cups 240g all-purpose flour
  • 1 teaspoon baking soda
  • 1 teaspoon baking powder
  • 2 teaspoons ground cinnamon
  • 1 teaspoon salt

Add Ins

  • ½ –¾ cup roughly chopped walnuts divided

Instructions

  • Preheat oven to 425°F. Line a jumbo 6-cup muffin tin with liners or grease generously.
  • In a large bowl, mash the ripe bananas until mostly smooth.
  • Add maple syrup, oil, eggs, vanilla, and sour cream to the bananas. Whisk until well combined.
  • Add flour, baking soda, baking powder, cinnamon, and salt. Fold with a spatula until just combined — do not overmix.
  • Fold in most of the walnuts, reserving a small handful for the tops.
  • Divide batter evenly between the 6 muffin cups, filling nearly to the top. Press reserved walnuts onto each muffin.
  • Bake at 425°F for 7 minutes. Without opening the oven, reduce temperature to 350°F and bake an additional 15 minutes, until golden and a toothpick inserted in the center comes out clean.
  • Cool in the pan for 15 minutes before removing and serving.

Notes

  • For extra maple flavor, brush the tops with warm maple syrup immediately out of the oven.
  • Full-fat Greek yogurt substitutes 1:1 for sour cream.
  • Weigh your flour (240g) for the most consistent results.
  • Muffins freeze well for up to 3 months — wrap individually and reheat from frozen for 45–60 seconds.
  • Bananas should be very ripe with heavy brown or black spotting for best flavor and natural sweetness.