Preheat your Oven to 350°F. Lightly grease a 9-inch Pie Dish, an 8x8-inch Baking Dish, or a similar oven-safe dish.

In a large Mixing Bowl, beat the softened 8 oz cream cheese softened to room temperature with a Hand Mixer (or stir vigorously with a Spatula) until smooth and lump-free.

Add the ½ cup Frank's RedHot sauce or your preferred buffalo hot sauce, ½ cup ranch dressing, and ½ cup blue cheese dressing or substitute additional ranch (if using) to the 8 oz cream cheese softened to room temperature. Mix until fully combined and smooth.

Fold in the shredded 2 chicken breasts cooked and shredded (about 2 cups) and ¾ cup of the shredded 1 cup shredded cheddar cheese divided. Stir until evenly distributed throughout the mixture.

Spread the mixture evenly into the prepared Baking Dish. Sprinkle the remaining ¼ cup of 1 cup shredded cheddar cheese divided and the ½ cup shredded mozzarella cheese evenly over the top.

Use sliced bread at room temperature for even results. For rolls or baguette-style loaves, slice in half lengthwise to expose more surface to the heat. For crispier French-style bread, lightly mist or rub the outside with water before loading it in. If adding cheese or toppings, have them ready to go. Position the rack in the center of the Toaster Oven before you start.

Preheat on the toast or bake setting. Toaster ovens run hotter and faster than full-size ovens, so ignore Oven timing. Standard sliced bread on a medium setting is done in 2 to 4 minutes depending on your model and slice thickness. Place bread directly on the rack or on a small Aluminum Foil-lined pan with space between pieces for even heat circulation. For rolls or French-style bread misted with water, set the temperature to 350°F to 375°F. The surface moisture creates a light steam effect that encourages a crisp exterior. Watch through the oven window rather than relying on a timer alone. Look for a deep golden-tan color. For a cheese melt, let the bread warm and lightly color first, then add cheese and continue until fully melted and bubbling. Use the broil function for even coverage. If the top browns too fast, loosely drape a small piece of foil over it to slow browning without stopping the cook.

Remove from the Oven and let it rest for 5 minutes before serving — it will be very hot. Garnish with sliced 2 stalks celery thinly sliced, for garnish, ½ cup blue cheese dressing or substitute additional ranch crumbles, and chopped 1 tbsp fresh chives chopped, for garnish if desired.