Season both sides of the chicken with half a teaspoon of salt and a quarter teaspoon of white or black pepper.
Place a wide-bottom pot on medium-high heat. Place chicken in the pot (no need to add any oil before placing the chicken - the fat from the chicken will be sufficient) and let it cook on one side for about 7 minutes. Flip to the other side and let it cook for another 5 minutes or until desired doneness. Remove chicken from pot. If the chicken splatters while cooking, reduce the heat and let it cook slowly.
To the same pot, add the butter and let it melt. Add the diced onion and minced garlic and saute until fragrant for about 2 minutes.
Add the flour and stir. Let the flour cook in the butter for 1 minute while stirring continuously.
Slowly add 2 cups of water into the pot and stir.
Add the chicken bouillon powder, remaining 1/4 teaspoon of white (or black) pepper and stir.
Add back the chicken to the pot. Make sure the chicken is completely immersed in the liquid or spoon some of the liquid on top to cover it. Cover and cook for about 5 minutes. After 5 minutes, open and stir.
Add the cream then let it simmer for another 3 minutes. Taste to ensure seasoning is perfect. I like a little more white pepper so I add some more at this point.
Add chopped parsley and stir then turn off the heat.
Serve with boiled rice or pasta. Garnish with more parsley if desired.
Notes
1. You could substitute the chicken bouillon powder with 2 4g stock cubes.2. If you love your sauce with some heat, you could add 1 teaspoon of red pepper flakes.3. For those living in Africa: note that I used soft chicken in this recipe. The chicken cooks easily by just placing it directly on the pot. If you are using hard chicken, I advise you boil it first together with the salt, black/white pepper and stock cubes (see Note 1). Then use the stock from boiling the chicken instead of water in the recipe. Hope this is clear. If not, you can leave a comment below with your question if you have doubts.4. You could add mushrooms to this Chicken in White Sauce. If you choose to add mushrooms, season with salt and black or white pepper then saute them right after cooking the chicken. Remove from the pot and add back when adding back the chicken.