Cut the potatoes into shot glasses - cut off the bottom off the potato so it can stand up straight. Cut a larger bit off the top and use a melon baller to remove the middle to form the shot glass shape.
Soak the cut potatoes in ice water for 1 hour
Meanwhile, mix the butter and milk in a bowl and microwave until the butter is melted and the milk is warm. Mix this with the potato flakes. Once combined, stir in the vodka, worcestershire, hot sauce, and old bay. Set aside, covered, to combine. It will thicken as it rests.
If you are baking the potatoes, dry them off, toss with some oil, then line them on a baking sheet. Preheat the oven to 400. Roast until the edges are browned and the potatoes are cooked throuigh, about 45 minutes.
If you are frying them, preheat the oil to 325. Dry the potatoes and fry for about 5 minutes. Remove from the oil and turn the heat up to make the oil 375. Fry again for 3 minutes until browned and crispy.
Mix equal parts cajun seasoning and old bay on a plate. After the potatoes are ready, dip them in the seasoning to form the rim.
Check on the potatoes. If they are not thick enough you can add some more flakes and let it sit more to thicken.
Put the boozy potatoes into a piping bag and squeeze them into the potatoes. Sprinkle with more old bay and/or cajun and serve.