INGREDIENTS
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2 tbsp. butter
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1 3/4 c. semisweet chocolate chips
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1 c. sugar
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1 egg plus 1 egg yolk
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1 tsp. vanilla extract
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1 c. grated zucchini (from 1 medium zucchini)
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1/2 c. all-purpose flour
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1/2 tsp. baking soda
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1/2 tsp. kosher salt
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3 tbsp. whole milk