Dredging: In a bowl, mix flour, garlic powder, salt, and white pepper. Dredge the chicken in the flour mixture, shaking off excess.
Cooking Chicken: Heat a large pan on medium-low and add a few drops of cooking oil. Cook the coated chicken breasts for about 7 minutes per side, until golden brown and cooked through. Remove and set aside.
Making the Sauce: In the same pan, lower the heat and add butter with minced garlic. Sauté for 1-2 minutes until fragrant. Add lemon juice, lemon zest, and white vinegar, simmering for a few minutes.
Light simmer: Return the chicken to the pan and coat it with the sauce. Cook for an additional 2-4 minutes until heated through. Plate the chicken and drizzle with any remaining sauce.