Pea, lettuce, and potato soup might not be the first combination that comes to mind when you want something both fresh and comforting, but it works beautifully. This vibrant green soup is not only quick to prepare but also packed with a delicate sweetness from the peas and creaminess from the potato and yogurt. Using butter lettuce adds a subtle freshness that lifts the flavor without overpowering it. I’ve found that letting the soup cool slightly before adding yogurt really preserves the smooth texture and prevents any curdling, which makes all the difference.
If you’re after cozy soups that combine vegetables with a creamy finish, this recipe is a great base to build on. You might also enjoy exploring ways to incorporate sweet potato or zucchini into creamy soups; a recipe like the creamy zucchini and sweet potato soup is good inspiration for warming up your meal rotation.
Why You’ll Love This Recipe
- Quick to make, perfect for a weeknight meal or light lunch
- Uses simple, fresh ingredients you likely have on hand
- Smooth, satisfying texture without heavy cream, thanks to yogurt
- The mint adds a refreshing note that balances richness
- A nicely balanced flavor that works well for all seasons
- Practical tip: cooling the soup before adding yogurt keeps it silky
Ingredients
- 3 cups (450 g) frozen peas
- 1 small head butter lettuce, chopped (about 4 cups/120 g)
- 1 medium potato, peeled and diced (about 1 cup/150 g)
- 1 small onion, chopped (about 1/2 cup/80 g)
- 4 cups (960 ml) vegetable broth
- 1/2 cup (120 g) plain yogurt (Greek yogurt works well)
- 1 tablespoon (15 ml) olive oil
- 1 tablespoon (15 ml) chopped fresh mint
Ingredient Notes
Frozen peas bring sweetness and vibrant color, making a big difference in taste and appearance. Butter lettuce is milder and softer than other lettuces, so it melts gently into the soup without becoming bitter or tough. The potato acts as a natural thickener, delivering creaminess without needing heavy cream. Plain yogurt adds a subtle tang and richness, but be sure to add it off heat to avoid splintering. Fresh mint brightens the whole dish; avoid dried, which won’t give the same fresh punch.
Kitchen Tools Needed
- Medium saucepan or soup pot
- Wooden spoon or spatula
- Blender or immersion blender
- Knife and chopping board
- Measuring cups and spoons
Step-by-Step Instructions
- Heat the olive oil over medium heat in your soup pot. Add the chopped onion and cook for about 5 minutes until softened and translucent, stirring occasionally to avoid browning.
- Stir in the diced potato and pour in the vegetable broth. Increase the heat slightly and bring to a gentle simmer. Cook for about 12 minutes or until the potato is tender when pierced with a fork.
- Add the frozen peas and chopped butter lettuce to the pot. Continue simmering for another 5 minutes until the peas are heated through and the lettuce is wilted but still bright green.
- Remove the pot from heat. Using a blender or immersion blender, puree the soup until completely smooth. The color should be a lovely bright green with a silky texture.
- Let the blended soup cool for about 2 minutes — this is key to prevent the yogurt from curdling. Stir in the plain yogurt gently, then mix in the chopped fresh mint.
- Return the pot to low heat and warm gently until heated through, but do not allow it to boil. Serve immediately.
Pro Tips
- Use an immersion blender for a smooth finish with less hassle and fewer dishes.
- Don’t skip the cooling step before adding yogurt; overheating can cause it to separate.
- Fresh mint is best added at the end to preserve its flavor and prevent bitterness.
- If your soup is too thick, thin it with a splash of broth or water to your liking.
- For a little extra aroma, sauté the onion with a pinch of salt to draw out moisture and flavor more evenly.
- To elevate the soup for guests, serve with a drizzle of good-quality olive oil or a sprinkle of toasted nuts.
Common Mistakes
- Adding yogurt directly to boiling soup, which causes curdling and grainy texture.
- Overcooking peas and lettuce until dull or mushy, losing bright color and fresh taste.
- Skipping the blending step or not blending thoroughly, resulting in uneven texture.
- Using a strong, bitter lettuce instead of a mild one like butter lettuce, which changes the flavor profile drastically.
- Forgetting to warm the soup gently after adding yogurt, which may make it feel less integrated.
Variations
- Swap out butter lettuce for spinach for a slightly earthier flavor.
- Add a squeeze of fresh lemon juice just before serving for a bright citrus note.
- Stir in grated Parmesan cheese after blending, for extra depth and a savory finish.
- For a vegan option, replace the yogurt with coconut yogurt or a cashew cream alternative.
Serving Suggestions
This soup is lovely on its own or paired with crusty bread or a light salad. It works well as a starter or a light lunch, especially when you want something nourishing but not heavy. Offering a side of warm, toasted almonds or a hard-boiled egg can add texture and protein for a more filling meal.
Storage Instructions
Store leftovers in an airtight container in the refrigerator for up to 3 days. Because this soup contains yogurt, avoid freezing as it may separate when thawed.
Reheating Tips
Reheat gently on the stove over low heat, stirring occasionally. Do not bring the soup to a boil to preserve the smooth texture and prevent the yogurt from splitting.
Nutrition Estimate (per serving, serves 4)
- Calories: 160
- Protein: 7 g
- Carbohydrates: 26 g
- Fat: 4 g
Recipe Summary
- Prep Time: 10 minutes
- Cook Time: 22 minutes
- Total Time: 32 minutes
- Servings: 4
- Cuisine: Simple home-style
- Course: Soup
- Calories: 160
Frequently Asked Questions
Can I use fresh peas instead of frozen?
Yes, fresh peas work well, but you may need to adjust the cooking time slightly as frozen peas cook quickly.
Can I make this soup ahead of time?
You can prepare the soup up to the blending step, then cool and refrigerate. Add yogurt and mint just before reheating to keep it fresh.
What if I don’t have butter lettuce?
Spinach or baby kale are good alternatives, though the flavor will be a bit different.
Is there a non-dairy substitute for yogurt?
Unsweetened coconut yogurt or cashew-based yogurt are good options for a dairy-free version.
How do I keep the soup vibrant green?
Avoid overcooking the peas and lettuce and blend while still warm. Adding yogurt off heat also helps maintain that color.
For those exploring further, you might find the creamy sweet potato and carrot soup with coconut and almonds is another wonderful way to enjoy seasonal veggies with rich and creamy textures.
This pea, lettuce, and potato soup is simple yet full of fresh flavor—a beautiful reminder that easy ingredients can produce something truly special in your bowl.
