If you are using a frying pan, use a thermometer. Do a couple first to see how they fry. If the bolinhos are too big they will take longer to cook through, and will also absorb more oil, so keep an eye on the size and work quickly. If you feel the bolinhos are the right size (like a 2 bite donut hole) and they are still not cooking through inside, but look golden on the outside, your oil might be a little too hot. Please note that every time you add something to the fryer the temperature of the oil will go down, so if you had to decrease your oil temp to cook through the bolinhos, you might notice yourself having to crank up the heat and then decrease it to ensure they are crisp outside and fully cooked on the inside. Any questions shoot me a note!