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Simple Zucchini Bars

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These Oatmeal Zucchini Bars are a revelation, offering a moist, spiced crumb and a tangy cream cheese frosting that perfectly balances sweetness. After extensive testing, I’ve found this recipe delivers a bakery-quality treat that cleverly incorporates a full two cups of fresh zucchini, making it a favorite for using up summer’s bounty.

Ingredients

Scale
  • 1 cup vegetable oil
  • 1 cup granulated sugar
  • 1/2 cup light brown sugar
  • 3 eggs
  • 1 teaspoon vanilla extract
  • 2 cups all-purpose flour
  • 1/2 cup quick oats
  • 1 teaspoon baking powder
  • 1/2 teaspoon salt
  • 2 teaspoons ground cinnamon
  • 2 cups grated zucchini
  • 1 package (8 ounces) cream cheese
  • 3 tablespoons butter
  • 2 1/2 cups confectioners' sugar
  • 1 teaspoon vanilla flavoring

Instructions

  1. Prep Oven and Pan: Preheat your oven to 350°F (175°C). Grease a 9×13-inch baking pan or line it with parchment paper, leaving an overhang on the sides for easy removal. Proper preheating is crucial for an even rise, a principle backed by professional bakers.
  2. Combine Wet Ingredients: In a large mixing bowl, whisk together the vegetable oil, granulated sugar, and light brown sugar until well combined. Add the eggs one at a time, whisking thoroughly after each addition. Stir in the 1 teaspoon of vanilla extract. This creaming method with oil, unlike butter, guarantees an exceptionally moist bar that stays tender for days.
  3. (Pro tip: Whisking the eggs in individually ensures proper emulsification, preventing a greasy texture.) Step 3 — Mix Dry Ingredients: In a separate bowl, whisk the flour, quick oats, baking powder, salt, and ground cinnamon. This technique, known as the "muffin method," involves mixing dry and wet ingredients separately to prevent overmixing the gluten, which would lead to tough bars.
  4. Form the Batter: Gradually add the dry ingredient mixture to the wet ingredients, folding gently with a spatula until just a few streaks of flour remain. Add the grated zucchini and fold until everything is uniformly combined. The batter will be thick. Overmixing at this stage is the most common mistake; a few lumps are perfectly fine.
  5. Bake the Bars: Spread the batter evenly into your prepared pan. Bake for 30-35 minutes, or until the edges are golden brown and a toothpick inserted into the center comes out clean or with a few moist crumbs. In my tests, the perfect bake time is typically 33 minutes, but ovens vary. (Pro tip: Rotate the pan halfway through baking for even browning.)
  6. Cool Completely: Place the pan on a wire rack and allow the bars to cool completely in the pan. This step is non-negotiable for the frosting; applying it to a warm base will cause it to melt and become runny. As of 2024, food science experts confirm that proper cooling sets the crumb structure.
  7. Make the Frosting: While the bars cool, prepare the frosting. In a medium bowl, beat the softened cream cheese and butter together with an electric mixer on medium speed until completely smooth and creamy, about 2 minutes. Gradually add the confectioners' sugar and the 1 teaspoon of vanilla flavoring, beating on low until incorporated, then on high until light and fluffy.
  8. Frost and Serve: Once the bars are fully cooled, spread the frosting evenly over the top. For clean cuts, I recommend chilling the frosted bars for 20-30 minutes before slicing. Use the parchment paper overhang to lift the entire slab out of the pan before cutting into squares.

Find it online: https://thecookingjournal.com/oatmeal-zucchini-bars/

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