Step 1

Heat a 3-quart saucepan over medium-high heat. Cook and stir beef and onion in the hot skillet until browned and crumbly, 5 to 7 minutes; drain and discard grease.

Step 2

Return pan to heat and season ground beef mixture with chili powder. Pour water into the saucepan and bring to a boil. Stir corn, tomatoes, and macaroni into the mixture; bring to a simmer and cook until the macaroni is tender, about 10 minutes.

Step 3

Sprinkle contents of cheese packet from macaroni and cheese package over the mixture; stir.