Start by gathering all your ingredients. Cook and dice the chicken breasts if not already done, using leftovers or rotisserie chicken for convenience.
In your slow cooker, layer half of the corn tortilla chips, followed by half of the diced chicken, half of the diced onions, and half of the Rotel.
Spoon half of the cream of chicken soup and cream of mushroom soup over the layered ingredients. Pour in half of the chicken broth to allow moisture throughout.
Repeat the layering with the remaining tortilla chips, chicken, onions, Rotel, and the remaining soups and chicken broth.
Sprinkle 1 cup of shredded cheddar cheese on top of the final layer to melt while cooking.
Cover and cook on low for 4-6 hours or on high for 2-3 hours until the chicken is heated through and flavors meld.
Once cooked, gently stir to combine and serve hot, optionally garnished with extra cheese or fresh cilantro.