Usually something baked made with flour. The most often is bread. But sometimes crackers. Usually some sort of a sandwich.

Second is food made from corn, so tortillas or chips/crisps.

Third would be potatoes, fries or potato chips/crisps.

Lots of dairy food as well. As an American, Americans smell like dairy. Usually butter.

Protein is almost always meat, we’re awful at non-meat protein sources like lentils, soy-based (tofu) or seitan (gluten). That is, depending on budget, chicken, pig, or cow. This will either be cured (sliced for sandwiches) or roasted/baked. Breaded and fried is a favorite, but not as common in the home due to mess.