Combine the ground turkey, yellow onion, red and yellow bell peppers, garlic, tomato sauce, black and pinto beans, corn, chili powder, salt, and black pepper in the bowl of a slow cooker.
2. Step
Cover the slow cooker and cook on low for 6–8 hours or on high for 4 hours.
3. Step
Once the chili has cooked for 6–8 hours, make the dumplings: In a large bowl, whisk together the eggs, melted butter, milk, and brown sugar.
4. Step
Add the flour, cornmeal, baking powder, and salt and stir until smooth. Fold in the cheddar cheese.
5. Step
Using a small ice cream scoop, dollop the dumpling batter on top of the chili. Cover and cook for 2 more hours on low or 1 more hour on high, until the dumplings are puffed and tender.
6. Step
Scoop the chili and dumplings into bowls and garnish with jalapeño, cilantro, and green onions, if desired.
