The Best, Creamiest Mac 'n Cheese with Guyere, Cheddar, and Bacon

INGREDIENTS

slices Bacon, thick-cut

1/2 tsp

Mustard powder, dried yellow

2 1/2 cups

Elbow macaroni noodles

1/4 cup

All purpose flour

1/2 tsp

Black pepper, freshly ground

1/8 tsp

Cayenne pepper

1 tsp

Table salt

4 tbsp

Butter, salted

1 1/4 cups

Gruyere cheese, good quality

2/3 cup

Parmesan cheese, good quality

1 1/4 cups

White cheddar cheese, good quality sharp

2 3/4 cups

Whole milk