- 2 avocados – peeled, pitted, and mashed
- 1/3 cup chopped grape tomatoes
- 1/3 cup chopped red onion
- 1 tablespoon key lime juice
- 2 tablespoons sour cream
- salt and ground black pepper to taste
- Gently stir avocado, tomatoes, and onion together in a bowl. Stir sour cream and lime juice into the avocado mixture. Season with salt and pepper; stir.
- Cover bowl with plastic wrap and refrigerate until guacamole is chilled, at least 20 minutes.