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Preheat oven to 350 degrees Fahrenheit.
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In a large bowl, combine avocados, cream cheese, sour cream, mayonnaise, hot sauce, lemon juice, old bay seasoning, garlic powder, and salt.
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Using a handheld mixer with beaters attached, mix until well combined, about 1 minute.
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Add ½ cup sharp cheddar cheese and crab meat to bowl. Stir to combine with a spoon.
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Spread mixture into a greased 8 x 8-inch oven safe pan.
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Place butter in a small bowl and microwave for 15 seconds or until melted.
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Add the breadcrumbs, dried parsley, and remaining cheese. Stir to combine.
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Sprinkle the bread crumb mixture over the casserole dish, being sure to cover the entire surface.
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Bake in oven for 40 minutes, until the bread crumbs are golden brown and crispy.
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Serve while hot with tortilla chips.