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Moist Peanut Butter Zucchini Cake topped with melted peanut butter drizzle and chopped peanuts on a white plate.

Peanut Butter Zucchini Cake Recipe | Moist & Flavorful Dessert

Moist Peanut Butter Zucchini Cake topped with melted peanut butter drizzle and chopped peanuts on a white plate.
Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Course Dessert, Cake
Cuisine American
Servings 9
Calories 320 kcal

Ingredients
  

  • Cake:
  • 1 cup 258 g creamy peanut butter
  • 1 cup 200 g brown sugar, packed
  • 1 large egg room temperature
  • 1 teaspoon vanilla extract
  • ¼ cup 61 g buttermilk
  • 1 ½ cups 187.5 g all-purpose flour
  • ½ teaspoon kosher salt
  • ½ teaspoon baking soda
  • 1 cup zucchini peeled, shredded, undrained, no seeds (small to medium size)
  • Toppings:
  • ½ cup 129 g creamy peanut butter, melted
  • Chopped peanuts optional

Instructions
 

  • Prepare the oven: Preheat oven to 350°F (175°C). Grease an 8x8-inch baking pan or line with parchment paper.
  • Mix wet ingredients: In a large bowl, beat together peanut butter, brown sugar, egg, vanilla, and buttermilk until smooth and creamy.
  • Add dry ingredients: Stir in flour, salt, and baking soda until just combined—do not overmix.
  • Fold in zucchini: Gently stir in the shredded zucchini until evenly distributed in the batter.
  • Bake the cake: Pour batter into the prepared pan and bake for 30–35 minutes, or until a toothpick inserted in the center comes out clean.
  • Add topping: Drizzle melted peanut butter over the warm cake and sprinkle with chopped peanuts if desired.
  • Serve: Let cool slightly before slicing into squares.

Notes

  • No need to squeeze out the moisture from the zucchini—its natural liquid keeps the cake tender.
  • For an extra indulgent touch, add chocolate chips to the batter before baking.
  • Store leftovers in an airtight container at room temperature for up to 3 days or refrigerate for up to 5 days.
Keyword peanut butter zucchini cake, zucchini dessert, peanut butter cake, moist zucchini cake, easy peanut butter recipes