Trisha's Macaroni and Cheese

Recipe from Trisha Headman

3 C uncooked elbow macaroni
1/2 C Butter
1/4 C Flour
4 C Milk
4 oz Sharp, white cheddar
1 lb Velveeta
1 C Cheddar cheese
2 tsp Dry mustard
3 shakes Onion powder
3  shakes Pepper

Preheat oven to 400°.  Cook macaroni just until tender.  In separate saucepan, melt butter. Blend in flour, mustard powder and pepper until smooth. Slowly stir in the milk, beating out any lumps. Add the cheeses and stir until thick and smooth.  Drain noodles and combine with the cheese sauce. Transfer into 9x13 pan and bake for 20-25 minutes until thick and bubbly.