Mix the cream cheese, mayonnaise, cheddar cheese, ½ cup Parmesan, and jalapeños in a large bowl or in a standing electric mixer fitted with a spatula paddle. Spray a baking dish with cooking spray, then pour the mixture in, evenly smoothing with a spatula.
Mix the Panko breadcrumbs and ¼ cup Parmesan in a small bowl. Evenly sprinkle over the top of the dip.
Bake at 350 until the cheese is bubbling (about 25 minutes).
Turn the heat up and broil for about 2 minutes, until top is golden brown.
Garnish with sliced jalapeños, if desired.
Serve warm or at room temperature with tortilla chips.
Nutritional information is provided as a courtesy only and should be construed as an estimate rather than a guarantee. Ingredients can vary, and Pineapple House Rules makes no guarantees to the accuracy of this information.