In a large pot or Dutch oven melt the butter over medium heat. Add the yellow onion, green onions, bell peppers, and minced garlic. Sauté until softened and fragrant.
Add the sliced chicken apple sausage, ground turkey, and ground beef. Season generously with the chili mix seasoning. Cook breaking the ground meats apart until everything is cooked through.
Add the diced tomatoes and cubed sweet potatoes. Stir to combine and let cook down for a few minutes.
Add the chili beans, pinto beans, kidney beans, chicken broth, pumpkin beer, and another round of seasoning to taste. Stir everything together. Bring to a boil then reduce the heat, cover, and simmer for 2 to 3 hours stirring occasionally until the sweet potatoes are tender and the chili has thickened and deepened in flavor.
Taste and adjust seasoning before serving.