"I am not kidding. This is seriously The Best Peanut Butter Sheet Cake - it melts in your mouth! No one will ever know it has a secret ingredient - zucchini!..."
INGREDIENTS
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1 3/4 cup granulated sugar
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1 3/4 cup all purpose flour
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1/2 teaspoon salt
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1 teaspoon baking soda
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2 cups grated zucchini (squeeze out excess liquid (will be approx. 1 cup zucchini after drained))
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1 cup creamy peanut butter
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2 eggs
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1 cup water
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1/3 cup milk
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1/2 cup creamy peanut butter
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1/2 cup unsalted butter
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1/4 cup milk
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2 1/2 cups brown sugar (packed)