Season Chicken. Season the 4 boneless, skinless, chicken breast cutlets with 1/2 teaspoon each of salt, pepper, and garlic powder. Optionally, sprinkle 1/4 teaspoon cayenne for a little heat. (Note: the cayenne will add spicy heat and will make the sauce a little more reddish brown in color.)
Brown Chicken. Make sure the Instant Pot is plugged in. Press the SAUTE button until it says "More". Then wait a few minutes while it heats up. During this time, the display will say "On." When the Instant Pot is ready, it will show "Hot" on the display. Add 1 tablespoon oil and 1 tablespoon butter. When the butter is melted, add the 4 seasoned chicken breasts and cook on one side for 4 minutes or until that side has turned white and golden brown in some spots. Turn and cook for another 3 or 4 minutes on the other side until that side has browned. When finished, remove the chicken from the Instant Pot and place on a plate. Set aside.
Saute Garlic and Shallots. Add the tablespoon of minced garlic and tablespoon of minced or chopped shallots and cook for 1 to 2 minutes.
Deglaze the pot with white wine. Press CANCEL to cancel the Saute function. Pour in 1/4 cup white wine. Using a wooden spatula, scrape the bottom of the pot to ensure no bits of food are stuck to the bottom of the pot. (See note below regarding using a trivet.)
Add Liquid. Pour in 1/2 cup of chicken broth and 2 Tablespoons of lemon juice and stir.
Add Back Chicken. Add the browned chicken back in the pot. (See note below.)
Pressure Cook 4 Minutes High Pressure. Press the MANUAL or PRESSURE COOK button (depending on model) and press HIGH PRESSURE. Then press the + or - sign to adjust the time to 4 minutes. Close and lock the lid. Move the Pressure Release valve to the SEALING position. (Note, it will take about 5 or 10 minutes to come up to pressure. During that time, the display will say "On." Once it comes up to pressure, it will start pressure cooking and the display will change to start counting down the time from 4 minutes. When it has finished pressure cooking, it will beep several times, and the display will start counting up from 0.)
5-Minute Natural Release. After the Instant Pot has finished pressure cooking and beeps several times, DO NOTHING for 5 minutes and allow the Instant Pot to release pressure naturally for 5 minutes. This means DO NOT TOUCH ANYTHING on the Instant Pot for 5 minutes.
Quick Release. After the Instant Pot has released pressure naturally for 5 minutes and the display shows "L0:05" (See photo in blog post.), using a long handled spoon (to keep your hands away from the rising steam), move the Pressure Release Valve to the VENTING position to allow the pressure to release quickly. This may take a minute or two.
Add Capers and Thicken The Sauce. Remove the lid and remove the chicken and place on a serving plate. Add the drained capers to the sauce. If you would like to thicken the sauce, make a cornstarch slurry by stirring together in a small bowl 2 tablespoons of cornstarch and 2 tablespoons of water. Stir until the cornstarch is dissolved. Then stir into the sauce. Wait a few minutes and the sauce should thicken.
To Make The Sauce Creamy (Optional). Add 1/2 cup heavy cream or milk to the sauce and stir. If you like, you can also add 1/4 cup parmesan cheese and stir. Ladle the sauce over the chicken. Sprikle with parmesan cheese to garnish. Enjoy!