Begin by preheating the oven to 425°F.
Put potatoes in a large pot and fill with cold water. Bring to a boil over high heat, then reduce heat and simmer for 10 minutes until just tender. Drain and set aside.
In a small saucepan, melt butter over medium heat. Add apple cider vinegar, crushed black pepper, Red Devil Hot Sauce and hot red pepper flakes. Let the mixture simmer for 5 minutes until the flavors have blended together.
Place potatoes on a baking sheet lined with parchment paper or aluminum foil. Drizzle the butter mixture over the potatoes and season with salt and pepper to taste.
Bake in the preheated oven for 25 minutes, stirring occasionally, until potatoes are golden brown and crispy. Sprinkle with a pinch of Kosher salt before serving.