I'm a terrible Mac & Cheese critic, as a kid I always ate the mac & cheese that came in potpie tins & just loved it. After tinkering ALOT the closest I could come was this:
2 cups of elbow macaroni (cooked)
4 Tbsp butter
3 Tbsp flour
2 cups milk (lower fat milk works fine)
1 Chicken Boulion Cube
1 1/2 cup shredded Mild Cheddar
1 cup cubed velveeta type cheese
1/2 tsp salt
pepper to taste
In a saucepan, melt butter and stir in flour til smooth. Gradually add milk and bring mixture to a boil, add boulion and stir for 2 minutes (or until mixture starts to thicken). Lower heat to a simmer and add cheeses and salt & pepper. When the cheese is melted mix together with cooked macaroni. Place in a greased casserole dish & bake 30 min @ 375º (I like the top of mine brown & bubbly).
You could easily put this in the crock instead of baking it. I also add sausage or hot dogs or whatever suits me.
Makes about 6 servings.