If your instant mashed potatoes turn out gritty, it can be disappointing, but there are several ways to fix them and improve their texture. Here are some methods to try:
Add more liquid: Gritty mashed potatoes often result from not using enough liquid during preparation. Try adding a little more hot water, milk, or broth to the mashed potatoes and mix thoroughly until the grittiness dissipates.
Continue mixing: If you didn't mix the instant mashed potatoes well enough initially, there might be pockets of undissolved potato flakes causing the grittiness. Continue mixing vigorously until the flakes are fully incorporated into the liquid.
Heat and rest: Sometimes, letting the mashed potatoes sit for a few minutes after preparation can help them absorb more moisture and soften any remaining grittiness. Heat them in the microwave or on the stovetop for a short time, then let them rest for a couple of minutes before stirring again.
Add butter or cream: Adding a small amount of butter, cream, or milk while reheating the mashed potatoes can help improve their texture and creaminess.
Use a blender or immersion blender: If the grittiness persists, you can use a blender or an immersion blender to smooth out the texture. Transfer the mashed potatoes to the blender, and blend on low speed until the grittiness disappears. Be cautious not to over-blend, as it can make the potatoes gluey.
Start over: If none of the above methods work, it might be best to start over with a new batch of instant mashed potatoes and ensure proper measurement and mixing of the ingredients.
Remember that instant mashed potatoes might never be as smooth and creamy as traditional mashed potatoes made from scratch, but these methods should help you improve their texture and make them more enjoyable. If you have the time and ingredients available, making mashed potatoes from fresh potatoes can provide a more satisfying and less gritty result.