"When cut into ragged shapes and stacked in a staggered fashion on top of one another, these chunky bars resemble a rocky ledge...."
INGREDIENTS
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1/2 cup (1 stick) unsalted butter, room temperature, plus more for pan
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2 1/4 cups all-purpose flour
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2 1/4 teaspoons baking powder
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1 teaspoon coarse salt
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1 1/2 cups packed dark-brown sugar
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3 large eggs
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1 teaspoon pure vanilla extract
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1 cup miniature marshmallows
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1 cup semisweet chocolate, coarsely chopped
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1 cup white chocolate, coarsely chopped
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1 cup toffee chips
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18 soft caramel-candy cubes, coarsely chopped