Broccoli Cheese Soup

1/2 C butter
1 onion chopped
1 package (16oz) frozen broccoli
4 (14.5oz) cans chicken broth
1 lbs velvetta cheese block
2 C milk
1 T garlic powder
2/3 C cornstarch
1 C water


In big pot, melt butter and saute butter. stir in broccoli and cover in chicken broth. Simmer until broccoli is tender, about 10-15 minutes. Reduce heat and stir in cheese cubes. Mix in milk and garlic powder. In small brown stir in cornstarch in water. Stir in cornstarch mixture into soup. Cook until thick.
Top with cheese or green onions.