Creamy Garlic Mushroom Chicken

Name: Creamy Garlic Mushroom Chicken
Prep time: 10 min
Cook time: 20 min
Total time: 30 min
Ingredients: 2x 9oz/250g Chicken Breasts, (brought close to room temp); 1/4 cup / 40g Flour ((see notes)); 1 tsp EACH: Salt, Garlic Powder; 1/2 tsp Black Pepper; 1 tbsp EACH: Olive Oil, Butter ((preferably unsalted)); 9oz / 250g Baby Button Mushrooms, (sliced fairly thin); 3/4 cup / 180ml Heavy/Double Cream, (at room temp); 3/4 cup / 180ml Chicken Stock; 1oz / 1/3cup / 30g freshly grated Parmesan; 2 large cloves of Garlic, (finely diced); 1 tbsp finely diced Fresh Parsley, (plus more to garnish if desired); 1 tbsp finely diced Fresh Chives; 1 tbsp Butter, (preferably unsalted (can sub oil, this is to fry the mushrooms)); 1/2 - 1 tsp Lemon Juice ((see notes)); Salt & Pepper, (to taste)