Things You'll Need
Rimmed baking sheet
Fryer or deep pot
When heating mozzarella sticks, little cooking is required. The goal is simply to heat the sticks, causing the cheese to melt and the outside crust to crisp. There's more than one method you can use, just make sure to watch them closely so you don't overcook them. When done, you'll have crisp, gooey mozzarella sticks ready for serving as a savory appetizer.
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Preheat the oven to 400 degrees Fahrenheit.
Set the mozzarella sticks in a single layer on a rimmed baking sheet and place in the oven.
Cook them for about four minutes and turn over with a spatula.
Cook the mozzarella sticks for another four minutes, or until they feel warm all the way through and the cheese is starting to melt out of the stick. To check if the sticks are cooked throughout, cut one open and feel whether the cheese is hot.
Place the mozzarella sticks in an even layer on a microwave-safe plate.
Heat the sticks on high power for about 30 seconds.
Turn the sticks over and microwave for another 30 seconds on high power.
Heat the sticks in 30 second increments until they feel warm throughout the middle and the cheese starts to melt from underneath the breading. To check if the sticks are cooked throughout, cut one open and feel whether the cheese is hot.
Use roughly two or three inches of oil in the deep fryer or pot. If using a pot, place it on a stove-top burner set to medium heat. Monitor the temperature of the oil by submerging a deep-fry thermometer into the oil while it heats.
Submerge the mozzarella sticks in the oil once it reaches 375 degrees Fahrenheit.
Fry the mozzarella sticks for one to two minutes, or until they look golden brown and float to the top of the oil.
Drain the mozzarella sticks on several layers of paper towels before serving.
Serve hot with marinara sauce on the side.