In the same skillet, reduce the heat to medium and add the minced garlic. Sauté for about 1 minute until fragrant.
Pour in the chicken broth and lemon juice, and bring the mixture to a simmer. Scrape any browned bits from the bottom of the pan.
Add the heavy cream and simmer for 2-3 minutes until the sauce begins to thicken slightly.
Reduce the heat to low and whisk in the butter, one piece at a time, until the sauce is smooth and creamy.
Stir in the lemon zest and capers (if using). Season with salt and pepper to taste.