Do not use mayonnaise as a straight swap. I know it’s tempting—it’s white and creamy—but mayo is egg-and-oil based, not tangy dairy. It will taste like a potato salad that lost its way. However, you can mix a small spoon of mayo with yogurt or buttermilk to boost creaminess. But alone? Don’t do it. Your taste buds will file a complaint.
Also, skip sour cream powder or packets if you’re in a pinch—those need actual dairy to rehydrate. You’re better off with the weird cottage cheese blender thing. Trust me, I’ve been there.
So here’s the bottom line: Plain yogurt wins every time. It’s in your fridge more often than you think, and it doesn’t judge you for forgetting the sour cream. The next time you open that empty tub, just shrug, grab the yogurt, and wink at your potato. You’ve got this.
And if all else fails? Eat the potato plain. It’s still a potato. It’s not going anywhere.