Place chicken breasts between two pieces of plastic wrap and beat with a meat mallet until they are about 1/4-inch thick. Be sure not to make any holes in your chicken during this process!
In a shallow plate, add your flour. To a different plate, add the panko breadcrumbs with the onion powder, garlic powder, salt and pepper and mix to combine.
In a bowl, whisk the eggs and heavy cream. Then set up your dipping station. I like to use the wet and dry method. With one hand dip the chicken in the flour (dry hand) and coat both sides. With the other hand(wet hand), dip it into the egg mixture. Then use the dry hand to coat both sides with the breadcrumb mixture. Press down the breadcrumbs on the chicken to ensure they will not fall during the frying process. Repeat with all the chicken pieces.
Heat the oil in a skillet on medium-high heat. Drop a breadcrumb in the oil to see if it sizzles. Fry each side of your chicken breast for about 3-4 minutes, flipping repeatedly to get an even golden brown color. Add more oil as needed in between each batch. You can check the internal temperature as well and make sure they are at least 165 degrees Fahrenheit. Transfer them to a plate when finished that is lined with paper towels and pat off the excess oil so the schnitzel won't become soggy.
Once done, serve immediately with lemon and parsley garnish. Enjoy!