Slow-Cooker Garlic Butter Potatoes and Green Beans

This two-in-one slow cooker side dish pairs baby red potatoes and green beans in a rich garlic herb butter with bright lemon zest. Everything goes into the same pot and cooks low and slow until the potatoes are fork-tender and the beans are crisp-tender. The result is a buttery, savory, and slightly bright vegetable side that practically makes itself — perfect for weeknight dinners or holiday spreads.

Baby red potatoes and green beans are a classic combination, but cooking them together in a slow cooker takes the effort out of the equation. A whole stick of garlic herb butter melts over the vegetables as they simmer on low for four hours, infusing every bite with savory flavor.

Lemon zest adds a fresh, citrusy lift that balances the richness. This recipe is a true dump-and-go side dish: layer the ingredients, set the timer, and come back to a tender, glossy pan of vegetables ready for the table.

Ingredients

Why this recipe works

Cooking the potatoes and green beans together in one slow cooker allows the garlic herb butter to melt and coat every piece as it slowly renders. The low, steady heat breaks down the potatoes' starches gently, making them creamy on the inside while the green beans stay bright and crisp-tender rather than turning to mush.

Because the potatoes sit on the bottom, they absorb the most butter and become exceptionally rich, while the green beans steam on top and keep some texture.

The lemon zest is stirred into the butter layer and perfumes the whole pot as it heats. Its bright, aromatic oils cut through the buttery richness without adding extra liquid, so the vegetables stay glossy rather than watery.

This method is forgiving and hands-off, making it ideal for busy cooks who want a flavorful side dish without standing over a stove. The slow cooker does all the work, and the finished dish looks and tastes like it took far more effort.

Notes and substitutions

Baby red potatoes are ideal because their thin skins hold up well during long cooking and their waxy texture stays creamy. Halving them ensures even cooking and lets the butter seep into the cut surfaces.

Green beans should be trimmed but left whole; they cook faster than potatoes, so layering them on top keeps them from overcooking. Garlic herb butter is convenient, but any compound butter with garlic and herbs will work — or use plain butter and add minced garlic and dried herbs.

A 6-quart slow cooker is the right size for this quantity; a smaller cooker may crowd the vegetables and lead to uneven cooking. If using a larger cooker, the cooking time stays the same, but check for doneness at the 3 1/2-hour mark. Shaved parmesan is a finishing touch that adds salty, nutty flavor — use a vegetable peeler to shave it from a wedge for the best texture. For a dairy-free version, substitute a plant-based butter and skip the parmesan.

• garlic herb butter: Use 1/2 cup (1 stick) salted butter softened and mixed with 2 cloves minced garlic and 1 teaspoon dried Italian herbs.
• baby red potatoes: Yukon Gold or fingerling potatoes work well; cut larger ones into even halves or quarters.
• green beans: Fresh wax beans or haricots verts can replace green beans; adjust cooking time slightly if thinner.
• lemon zest: Use 1/2 teaspoon lemon extract or 1 tablespoon lemon juice added at the end if fresh zest is unavailable.

Equipment

• 6-quart slow cooker
• Tongs
• Cutting board
• Chef's knife
• Measuring spoons
• Vegetable peeler (for lemon zest)