INGREDIENTS
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3/4 cup (1 1/2 sticks) unsalted butter
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1 1/2 ounces store-bought waffle cones, lightly crushed
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1 1/2 cups old-fashioned oats
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2 tablespoons all-purpose flour
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1 1/2 teaspoons kosher salt
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3/4 cup (packed) light brown sugar
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1 large egg yolk
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2 teaspoons vanilla extract
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4 pints ice cream (any flavors)