1/4 lb. butter
1 grated onion
1 jar sm. Kraft cheese whiz
1 can crabmeat
1 can cut up mushrooms, 4 oz.
English muffins

Mix butter, onion and cheese whiz. Add the crabmeat and mushrooms. Spoon mixture on split English muffins. Bake at 350 degrees for 10 to 15 minutes. Cut in four to serve.