Classic Macaroni and Cheese PT40M https://img5.recipesrun.com/201907/2019/1111/b1/c/643219/300x200x90.jpg This is a macaroni and cheese I first made 3 years ago when I was in California. When I got back to Texas I made it for my mom. This is now her favorite baked macaroni and cheese. She begs me to make it when I come to visit. 6 servings Ingredients: 1 (8 ounce) package processed American cheese, cut into strips 2 cups shredded sharp Cheddar cheese 1 (8 ounce) package elbow macaroni 1/4 tsp. ground black pepper 1/2 tsp. dry mustard 3/4 tsp. salt 2 cups milk 2 tbsp. all-purpose flour 1/4 cup finely chopped onion 2 tbsp. butter