"Triple the chocolate, triple the deliciousness. ????..."
INGREDIENTS
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1/2 c. vegetable oil, plus more for the pans
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1 c. bittersweet chocolate chips
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1 c. milk chocolate chips
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2 c. all-purpose flour
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1 c. unsweetened cocoa powder
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1 1/2 tsp. instant espresso powder
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1 tsp. baking powder
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1 tsp. baking soda
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1 tsp. kosher salt
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4 large eggs
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1 c. granulated sugar
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1/2 c. packed light brown sugar
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1/2 c. sour cream
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1 tbsp. vanilla extract
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3 c. coarsely grated zucchini (from 1 lb. zucchini, about 2 medium zucchini)
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Flaky salt, for serving (optional)