Combine cream cheese, sour cream, heavy whipping cream, and garlic powder in a large skillet. Heat over medium-high heat, stirring to melt and combine. Add 1/2 cup Cheddar cheese, cooked chicken, and cooked bacon.
Transfer half of mixture to an 8- x 8-inch baking dish. Top with jalapeño halves. Top jalapeño with remaining mixture. Sprinkle remaining cheese on top of mixture.
Bake at 400° for 10-15 minutes or until mixture is bubbly and cheese is golden.