Arrange on the tray: Place each cheese-wrapped olive on the foil-lined baking sheet, leaving a little space between them so the heat can circulate. They’ll spread just slightly as they bake.
Bake until golden and melty: Slide the tray into the preheated oven and bake for 12–16 minutes, or until the cheese bombs are bubbling, lightly golden brown, and look a bit glossy with a slight greasy sheen on the foil. The edges should be just starting to crisp, but the centers will still look soft.
Cool briefly and serve: Remove the tray from the oven and let the cheese olive bombs sit for 3–5 minutes to firm up slightly; they’ll be very hot inside. Serve warm right from the tray or transfer them carefully to a serving plate, scooping up any crispy cheese bits stuck to the foil as a cook’s treat.
For a milder flavor, use a mix of mild cheddar and mozzarella in place of sharp cheddar, keeping the Parmesan for that salty, gourmet edge. If you have picky eaters who aren’t crazy about olives, you can wrap the cheese mixture around small pieces of cooked sausage or tiny cubes of ham instead—still low carb and just as fun to eat. For a little extra kick, add a pinch of garlic powder or smoked paprika to the cheese blend (this technically adds another ingredient, so think of it as a flexible upgrade when you’re not strictly sticking to three). You can also switch to stuffed green olives—pimento, garlic, or jalapeño-stuffed olives make these feel even more special for parties. To prep ahead, form the cheese bombs and refrigerate them on a tray for up to a day before baking; just add a minute or two to the bake time. If you like them extra crispy on the bottom, keep using foil and don’t add parchment—foil helps them get that golden, slightly frico-like edge my neighbor’s always had at our block parties.