Add the cashews to a high-powered blender along with ½ cup water, garlic, onion powder, salt, pepper, nutritional yeast, and lemon juice. Blend on high speed until smooth and creamy. Add additional ¼ cup of water to your liking for a less creamy consistency.
Blend on high speed until smooth and creamy. Add additional ¼ cup of water to your liking for a less creamy consistency. Scrape down the sides with a silicone spatula as you blend.
Taste and adjust to seasonings to your liking. Add more nutritional yeast for a more cheesy flavor. Add more lemon for acidity.