Ingredients (17)⌄
8 ounces (230 grams) Macaroni
1/3 cup Plain Flour
3/4 teaspoon Mustard Powder
1/2 teaspoon Garlic powder
1/2 teaspoon Kosher salt
1/2 teaspoon Black pepper
1/8 teaspoon Cayenne pepper
6 tablespoons (85 grams) Butter
1 1/2 cups (360 milliliters) Whole Milk
1 cup (240 milliliters) Heavy Cream
1 pound (455 grams) Monterey Jack Cheese
4 tablespoons (55 grams) Butter
1 teaspoon garlic powder
16 slices square Bread
8 slices mild Cheddar Cheese
8 slices Colby Jack Cheese
4 tablespoons (55 grams) Butter
Grilled Mac and Cheese Sandwich
Refrigerate until cool and firm, about 1 hour.