Step 1: Preheat the oven - Preheat your oven to 350 degrees and set out a 9x13 baking dish. This size dish works perfectly for holding the chicken breasts while giving the topping room to melt and bubble.
Step 2: Make the creamy topping - In a medium bowl, add the mayonnaise, softened cream cheese, chopped green onions, crumbled bacon, and one cup of shredded Colby Jack cheese. Use a fork to mix everything together until the mixture becomes creamy and fully combined. Using a fork helps break up the cream cheese so the topping mixes smoothly.
Step 3: Arrange the chicken - Place the chicken breasts into the baking dish in a single layer. If the chicken breasts are very thick, slightly pounding them or slicing them thinner will help them cook evenly.
Step 4: Spread the topping - Spoon the cream cheese mixture evenly over the top of each chicken breast. Spread it out so every piece is fully covered.
Step 5: Add the final cheese layer - Sprinkle the remaining half cup of shredded Colby Jack cheese over the top of the creamy mixture. This creates that beautiful melted layer as the chicken bakes.
Step 6: Bake - Place the dish in the oven and bake for 30 to 35 minutes. The chicken is ready when it reaches an internal temperature of 165 degrees and the cheese on top is melted and bubbly.
Step 7: Serve and enjoy - Once the chicken is finished cooking, you can sprinkle extra bacon or green onions over the top if you like. Serve it warm over mashed potatoes, rice, or roasted vegetables and enjoy every creamy bite.