One Pot Baked Spinach and Artichoke Mac and Cheese

Bahan-bahan (6 porsi)

• 6 tablespoons salted butter, at room temperature, plus more for greasing
• 1 (1-pound) box short-cut pasta, such as macaroni
• 2 cups whole milk ((see Note))
• 1 (8-ounce) package cream cheese, cubed
• 3 cups shredded sharp cheddar cheese
• Kosher salt and freshly ground pepper
• Ground cayenne pepper
• 2 cups packed fresh baby spinach, chopped
• 1 (8-ounce) jar marinated artichokes, drained and roughly chopped
• 1½ cups crushed Ritz crackers (about 1 sleeve) ((about 1 sleeve))
• ¾ teaspoon garlic powder