Step 1: Cook the Pasta : Bring a large pot of salted water to a boil. Cook pasta according to package instructions until al dente. Drain and set aside.
Step 2: Cook the Ground Beef : Heat olive oil in a large skillet or pot over medium heat.
Add diced onion and sauté for 2–3 minutes until translucent. Add garlic and cook for 30 seconds until fragrant. Add ground beef and cook until browned, breaking it apart with a spoon. Season with chili powder, cumin, smoked paprika, salt, and pepper.
Step 3: Add Chili Ingredients : Stir in diced tomatoes, tomato sauce, and kidney beans. Simmer over medium heat for 5–7 minutes to allow flavors to meld.
Step 4: Combine with Pasta and Cheese : Reduce heat to low and stir in cooked pasta. Add shredded cheddar cheese and milk or cream. Stir until cheese melts and the mixture is creamy and well combined.
Step 5: Serve ; Spoon chili mac into bowls or onto plates. Sprinkle with extra shredded cheese and optional toppings like sour cream, green onions, or jalapeños. Serve hot and enjoy immediately.