Artichoke Alfredo Sauce | America's Test Kitchen

Ingredients

• 4 tablespoons unsalted butter
• 1 small onion , chopped fine
• 1 clove garlic , minced
• 2 (8-ounce) cans artichoke hearts , drained, rinsed, and chopped coarse
• 1/2 cup sour cream
• 1 1/4 cups heavy cream
• 1/2 cup finely grated Parmesan cheese
• 1/2 teaspoon grated lemon zest from 1 lemon
• 1 tablespoon fresh lemon juice from same lemon as zest
• 1/4 cup chopped fresh parsley leaves
• 2 tablespoons chopped fresh basil