1-First step: Get the oven and pan ready Start by preheating your oven to 350 degrees Fahrenheit. Lightly spray a 9×13-inch pan with cooking spray so the casserole does not stick. This small step makes serving much easier later. If you are making a lighter version, you can use a little extra spray or a parchment lining that fits your dish.

2-Second step: Mix the creamy filling In a large bowl, combine the 3 cups chopped cooked chicken, 16 ounces sour cream, 1 can of cream of chicken soup, 1 packet ranch seasoning mix, 1 cup chopped cooked bacon, and 2 cups shredded cheddar cheese. Stir until everything is well blended. The mixture should look thick, creamy, and fully coated. If you want to add vegetables, this is the best time to fold in frozen green beans or sautéed mushrooms.

3-Third step: Fold in the tater tots Gently fold in the frozen tater tots. You do not need to thaw them first. Keeping them frozen helps them bake up with a better texture. Stir carefully so the tots stay whole and do not break apart too much. If you prefer more of a topping-style casserole, save some tots to place on the top instead of mixing them all through.

4-Fourth step: Transfer to the baking dish Spoon the mixture into the prepared 9×13-inch pan and spread it out evenly. Make sure the filling reaches the corners so the casserole bakes at the same rate. At this stage, you can cover and chill it if you want to make it ahead. This is a great option for meal prep, potlucks, or nights when you know dinner will be rushed.

5-Final step: Bake until bubbly Bake uncovered for 40 to 45 minutes, until the casserole is bubbly and hot throughout. The top should look golden and the edges should be bubbling nicely. Let it rest for a few minutes before serving so it sets up a bit. That short rest makes it easier to scoop and helps the flavors settle.