Preheat oven to 350° and line a baking sheet with aluminum foil. Set aside.
Rinse, dry and poke potatoes with a fork.
Brush the potatoes with vegetable oil and place on baking sheet.
Place in oven and bake until potatoes are tender when pierced with a fork, about 1 hour.
Cook bacon while potatoes are baking. Crumble and set aside.
Remove potatoes from oven, place on a wire rack and once potatoes are cool enough to handle, slice in half, lengthwise.
Scoop out the flesh leaving ¼ inch remaining and place back on backing sheet.
Top with shredded cheese, bacon, diced jalapeños and place in the broiler for a couple minutes until the cheese is melted and bubbly.
Carefully remove and arrange on serving tray. Serve warm.
Optional, garnish with sour cream and sliced green onions, if desired.