Grate your own Parmesan instead of buying pre-grated–the cheese will melt better for a silkier sauce.
Add flour and garlic; cook, stirring constantly, until fragrant, about 1 minute.
Add broth and bring to a boil over high heat.

Cook, whisking occasionally, until reduced by half, about 5 minutes.
Reduce heat to medium-low.
Slowly whisk in half-and-half.
Add basil sprig and cook, stirring often, until thickened, about 8 minutes.
Remove from heat; discard basil sprig.
Stir in chopped basil, Parmesan, salt and pepper.
- Daily Values (DVs) are the recommended amounts of nutrients to consume each day.
(-) Information is not currently available for this nutrient.