Prepare Your Oven and Dish: Preheat your oven to 350°F (175°C). Lightly grease a 9-inch round baking dish or a similar-sized cast-iron skillet.
Mix the Creamy Base: In a medium-sized bowl, use a hand mixer or a sturdy spoon to beat the softened cream cheese, mayonnaise, and sour cream together until smooth and thoroughly combined.
Fold in the BLT Flavors: Gently stir in the crumbled bacon, diced tomato, sliced green onions, and shredded cheddar cheese until everything is evenly distributed throughout the mixture.
Bake to Bubbly Perfection: Spread the dip evenly into your prepared baking dish.
Bake for 20 to 25 minutes, or until the dip is hot, bubbling around the edges, and lightly golden on top.
Garnish and Serve Hot: Remove from the oven and let it rest for a minute. Generously top with shredded lettuce, more diced tomatoes, bacon pieces, and green onions.
Serve immediately with your favorite dippers.