I’m thinking about things like the invention of refined white cane sugar, the invention of the electric oven, the microwave, outdoor grilling with propane, etc. I’m interested in a historians view on what the most important inventions were that shaped home cooking in American history.
I'm having trouble understanding the question accurately; your title seems to ask a different question. Would it be fair to say you want to know "What were the major innovations in home cooking technology in the United States since the 1800s?"