In a large pot or Dutch oven, brown the ground beef and ground turkey over medium-high heat. Drain off any excess grease.
Add the chopped onion and cook until softened, about 5-7 minutes. Stir in the minced garlic and cook for another minute until fragrant.
Stir in the chili powder, cumin, smoked paprika, and cayenne pepper (if using). Cook for 1 minute, stirring constantly.
Pour in the diced tomatoes (with their juice) and tomato paste. Stir to combine.
Add the beef broth, kidney beans, black beans, and frozen corn. Bring the chili to a simmer.
Reduce the heat to low, cover, and simmer for at least 30 minutes, or up to 1 hour, stirring occasionally. The longer it simmers, the more the flavors will meld.
Season with salt and black pepper to taste.
Serve hot. Optional toppings include avocado, cilantro, or a dollop of coconut milk.
Notes
This paleo chili is perfect for a cold evening. It's naturally gluten-free and dairy-free.