01 -
Start by heating your oven to 400°F. Give your muffin tin or baking dish a good spray with non-stick cooking spray - this will make your life much easier when it's time to serve these cheesy bites!
02 -
Grab a large bowl and toss in your cold leftover mashed potatoes, breaking up any big lumps with a fork. Add in the shredded cheddar, grated Parmesan, eggs, milk, garlic powder, onion powder, and a pinch each of salt and pepper. Mix everything together until smooth and well incorporated.
03 -
If you're using those fresh chives (highly recommended!), fold them gently into the potato mixture. They'll add little bursts of color and flavor throughout your puffs.
04 -
Spoon the creamy potato mixture into your prepared muffin tin, filling each cup about three-quarters full. This gives them room to puff up nicely as they bake. For an extra indulgent touch, sprinkle a little more cheese on top of each one.
05 -
Slide your tin into the preheated oven and bake for 20-25 minutes. You're looking for beautifully golden tops and irresistibly crispy edges - the contrast with the creamy center is what makes these so special!
06 -
Once they're done, let the puffs cool in the pan for just a few minutes - they'll be easier to remove. Garnish with a few more snipped chives if you're feeling fancy, then serve while they're still warm and the cheese is all melty and wonderful.