Using either a 6 or 8 quart Instant Pot, use the saute feature to brown the ground beef. Cook the beef until it is 90% or more done. Drain if desired.: The first scents are savory and rich as the ground beef hits a hot surface, and you want to hear a steady sizzle that signals browning rather than steaming. Browning creates those caramelized bits that translate to deep meat flavor, and as the beef darkens, little droplets of fat will render and glisten. Stir occasionally to expose all meat to the heat and break up large clumps so it cooks evenly. A common mistake is adding the meat to a pan that is not hot enough, which leads to pale, boiled-looking meat and less flavor. If you see liquid pooling heavily, let it evaporate before continuing to encourage browning.
To the pressure cooker add all remaining ingredients.: The meat should be mostly browned with just a hint of pink remaining, which ensures it finishes through under pressure without drying out. You will notice a firmer texture and a richer aroma as proteins tighten and the surface caramelizes. This stage preserves juiciness while maximizing flavor development. Overcooking here can make the meat crumbly and dry after pressure cooking, so aim for the specified doneness and be ready to move to the next step.
Cook on the manual high setting for 6 minutes.: If there is an excess of rendered fat and liquid, tilt the pot and spoon out the extra or use a sieve to drain, leaving enough fat to carry flavor. The visual cue is a sheen of fat atop the meat; too much will make the final chili greasy, while too little may yield a lean, flatter profile. I prefer to leave a small amount for richness but remove obvious excess. Avoid tossing all fat prematurely if you like a silkier mouthfeel, but do remove excessive pools to keep the chili balanced.
When the chili is done perform a quick release.: When you add the tomato juice , tomato purée , drained kidney beans , drained pinto beans , chopped onion , diced celery , diced green bell pepper , chili powder , cumin , garlic powder , salt , ground black pepper , dried oregano , sugar , and cayenne pepper , you will notice the pot transform from fragmented browned meat to a unified, saucy mixture. Stir to incorporate so the spices dissolve into the liquids and coat the meat and beans evenly. The aroma should shift to a unified, spiced tomato fragrance. A frequent error is inadequate mixing, which leads to pockets of dry spice; take a moment to blend thoroughly so every spoonful tastes consistent.
Serve immediately.: Under pressure, the flavors compress and meld quickly, giving that slow-cooked depth. You may hear a gentle clicking or maintain silence depending on your model, and steam will build until the cooker locks. The pressure environment softens beans slightly and allows spices to infuse the meat and sauce. If you try to reduce this time drastically the beans may remain starchy and the flavors underdeveloped, so trust the timing and resist the urge to open early.
When the chili is done perform a quick release: Releasing pressure quickly cools and stops cooking immediately, preserving bean texture and preventing overcooking. You will see a burst of steam and hear a rush as the valve is opened; use a long utensil or a cloth to protect your hand. Once the pin drops, open the pot and notice the intensified aroma as steam escapes. A common misstep is using a slow release here, which can turn beans mushy, so follow the quick release instruction for the intended texture.
Serve immediately: Ladle the chili into bowls while hot so the steam and aroma greet your guests right away. The surface should be glossy, the beans intact, and the meat tender. Serve with sides or garnishes as you prefer, but be mindful that letting the chili sit too long before serving concentrates liquids and can thicken the pot considerably. If the chili becomes overly thick while resting, stir in a splash of reserved tomato juice or water and reheat gently to loosen it up.