Do not worry, this happens all the time in the kitchen, and you likely already have a few common staples on hand that will give you fantastic results without needing any artificial creamers.
One of the simplest and most traditional solutions is to use extra melted butter combined with a little bit of the hot, starchy potato boiling water or warm chicken or vegetable broth. The starchy water helps emulsify the butter directly into the potatoes, creating a smooth and fluffy texture while letting the natural potato flavor shine.
If you have other dairy products in your refrigerator, sour cream or plain Greek yogurt are wonderful choices. Adding a few tablespoons alongside your butter will yield an exceptionally creamy texture with a pleasant, subtle richness.
Other great kitchen staples include cream cheese, evaporated milk, or even a small spoonful of standard mayonnaise in a pinch. Whatever you choose, I recommend warming your substitute slightly and adding it a little at a time while mashing so you can easily control the final consistency, followed by adjusting your salt and seasonings to taste.
