In pan over medium heat melt butter, stir in flour until combined
Slowly add milk
Stir occasionally until thickened
Remove from heat and stir in cheese until melted
Add noodles
Place in oven safe pan
Toss pulled pork with BBQ sauce, place on top of mac and cheese
Drizzle additional BBQ sauce on top if desired
Bake for 20 minutes at 350 or until bubbly