Make a dredging station by placing the panko crumbs in a shallow bowl and season them with sea salt, freshly cracked pepper, and garlic powder to taste; mix well.
Place the flour in a shallow bowl and season it with sea salt, freshly cracked pepper, and garlic powder to taste; mix well.
Whisk the egg in a shallow bowl and season it with sea salt, freshly cracked pepper, and garlic powder to taste; mix well.
Prepare the croquettes by scooping 1 tablespoon of mashed potatoes (using a cookie scooper), pressing a piece of cheese in the center, then adding another tablespoon of mashed potatoes to the top. Form into a round ball.
Roll the potato ball evenly in the flour, then the egg, and then into the panko crumbs. Place on a plate with parchment paper. Repeat with the remaining potato and cheese.
Place into the refrigerator for 30 minutes. Side Note: Don’t skip this step; it helps the panko adhere to the potato balls.
Cook the croquettes by pouring oil into a small deep skillet and heating over medium-high heat until a thermometer registers 350 degrees.
Gently lower a few potato croquettes into the HOT oil with a slotted spoon and fry, rolling them in the oil, until deeply golden brown, 3-4 minutes.
Transfer to a wire cooling rack while cooking the remaining potato croquettes (this helps retain their crunch!). Repeat with the remaining potato croquettes.
Serve immediately with ranch dressing and barbecue sauce, if desired. Enjoy.