Add 1/2 medium chopped onion and 1 tablespoon olive oil to your Instant Pot and press the sauté button. Cook for 4-5 minutes.: You will hear a gentle sizzle as the olive oil warms and the onion hits the pan, releasing a sweet floral aroma that becomes richer as the pieces soften and edges turn pale gold. This softening is important because raw onion can taste sharp after pressure cooking, so giving it this head start mellows its flavor. A common mistake is turning the heat too high and letting the onion char quickly, which introduces bitterness. Keep the sauté setting steady and stir occasionally so the pieces cook evenly and develop a translucent sheen.
Stir in 2 pounds lean ground beef and cook, stirring often and breaking it up with your spoon, until browned.: As the ground beef hits the hot surface you will notice an immediate change in sound, with a more vigorous sizzle and little pops as moisture escapes. Browning creates those savory Maillard notes that make the chili feel meaty and robust. Use a sturdy spoon to break the meat into small crumbles, and let it sit briefly between stirs so contact with the hot surface encourages browning rather than steaming. A common error is overcrowding the pan, which causes the meat to steam and become gray instead of developing those desirable browned bits. If you see lots of liquid pooling, tilt the pot and spoon some off, or increase the surface contact time to encourage evaporation.
Stir in 3 cloves minced garlic, and then add 1 (28-ounce) can diced tomatoes, 1 (14-ounce) can tomato sauce, 1/2 cup beef broth, 2 (14-ounce) cans red kidney beans, 3 tablespoons chili powder, 1 tablespoon smoked paprika, 1 teaspoon ground cumin, 1 teaspoon cayenne pepper, and salt and pepper. Close the lid, ensure the valve is set on "sealing", press the "manual" button, and set the timer for 15 minutes.: The moment you add the garlic the air will fill with a warm, toasted aroma, but avoid letting it darken too long, as burnt garlic will taste acrid. Pouring in the canned tomatoes and tomato sauce introduces a bright acidity that balances the rich meat, while the beef broth loosens the mixture and helps the spices distribute. Stir so the spices coat the meat and beans, making sure there are no pockets of dry powder. A key benefit here is that the spices bloom into the liquid, releasing more nuanced flavors during pressure cooking. A common pitfall is under seasoning at this stage because you cannot taste much while it is raw; season modestly now and adjust after the pressure cooks and flavors concentrate.
Once the countdown has finished, you can do a quick pressure release or let the pressure release naturally (this will build more flavor). Season with extra salt & pepper as needed and serve with desired toppings.: When you secure the lid and switch to sealing, the Instant Pot begins building pressure and you will soon notice a soft hum and rising warmth. This pressurized environment forces the flavors to meld quickly and extracts more depth from the canned tomatoes and spices. Setting a timed 15 minute cook lets the beans and meat absorb flavors without turning mushy, but avoid setting an overly long cook that will leave the texture too soft. A typical error is forgetting to set the valve to sealing, which prevents pressure from building and leads to inconsistent results. Double check the valve position before walking away.
Once the countdown has finished, you can do a quick pressure release or let the pressure release naturally (this will build more flavor). Season with extra salt & pepper as needed and serve with desired toppings.: Releasing the pressure quickly gives a brigher, slightly fresher profile, while letting it release naturally concentrates flavors and slightly thickens the sauce as steam escapes. When you open the lid, take a deep breath and note the steam rich with tomato and spice aromas. Taste carefully and adjust with salt and pepper , because the true seasoning is revealed after pressure. A common mistake is adding too much salt before cooking; wait to finish seasoning at the end when you can judge the full flavor. Finally, garnish with your chosen toppings to add contrast in texture and temperature before serving.