Combine the first 7 ingredients in a bowl; stir well with a wire whisk. Stir in cheddar cheese and crabmeat.
Spoon the crabmeat mixture into a 1 1/2-quart casserole coated with cooking spray, and sprinkle with paprika. Bake at 325° for 30 minutes or until thoroughly heated. Serve warm with plain crackers.
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