Add the potatoes to a stock pot and cover with water. Bring the water to a boil, lower heat and simmer for 10 minutes - or until the potatoes are fork tender. Drain the potatoes.
Add 1/4 cup olive oil, 1/4 teaspoon pepper and 1/4 teaspoon of salt to a rimmed baking sheet. Place the potatoes on the baking sheet and use the bottom of a glass to press the potatoes down. Once all of the potatoes are smashed, add the rest of the oil, salt & pepper. Place in the oven and bake for 20 minutes, flipping halfway. Flip again and drizzle with the buffalo sauce. Bake for another 5-10 minutes, or until the potatoes are crispy.
Meanwhile, add all of the ranch ingredients to a bowl and stir to combine. Taste and adjust seasonings as needed. Add non-dairy milk to thin as needed.
Serve the potatoes with more cilantro and the ranch on the side.