Preheat oven to 425degF. Start water boiling for pasta.
Line a baking sheet with parchment and lay out slices of bacon in a single layer. Cover with a baking rack (this prevents curling). Back for 20 minutes. Remove bacon to paper towel covered cutting board, bloat excess grease. Then chop to bacon bit sized pieces.
Spread out pizza dough (one recipe on each of two parchment paper covered baking sheets). Bake for 10 minutes and then remove from oven. (It will not be cooked through but will have a crust developed).
Add pasta to boiling water. Cook as directed on package. Drain in colander, rinse with cool water and return to pot (away from heat).
In a sauce pan over medium-high heat, add butter, onion powder, and garlic powder. Once melted whisk in flour and let cook for 3 minutes. Whisk milk, ground mustard, salt, pepper and paprika. Let cook another 2 minutes before whisking in heavy cream. Once incorporated and thickened, add cheese - stirring regularly to fully melt and combine.
Add cheese sauce to cooked pasta and toss to coat.
Spread half of mac & cheese on each par-cooked pizza crust. Sprinkle each with half of bacon, half of the jalapeno slices and half of additional cheese. Return to oven and cook for 10 minutes more. Let cool for at least 5 minutes before slicing to serve.