Make the Roux
In a large sauce pan, melt the 4 tablespoon of butter on medium-high heat until it begins to bubble.
Vigorously whisk in the 3 tablespoon of flour. It will form clumps. Keep whisking until it turns golden brown.
Make the Cream Sauce
Whisk in the ½ cup of white wine. Whisk until the large lumps begin to break down.
Add the juice from half of the lemon and slowly pour in the 1 cup of plant milk and keep whisking until the sauce is smooth and velvety.
Stir in the ½ cup of grated vegan parmesan until it’s combined and bring to a low boil, then reduce the heat to simmer.
Add the 1 teaspoon of onion powder, 1 teaspoon of garlic powder, 1 teaspoon of dried parsley, ¼ teaspoon ground black pepper, ½ teaspoon smoked salt (or ⅛ teaspoon of liquid smoke and ½ teaspoon sea salt), and ¼ teaspoon of red pepper flakes (optional), and stir until fully combined.
Stir in the basil until fully combined and serve.
Enjoy!