This slow cooker 5-ingredient Amish tomato noodle soup is exactly the kind of thing my aunt shows up with at every summer potluck, and somehow the pot is always scraped clean first.

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This slow cooker 5-ingredient Amish tomato noodle soup is the kind of old-fashioned comfort dish that quietly steals the spotlight at any summer potluck. It looks simple, even modest at first glance, but by the end of the gathering there’s always that one empty slow cooker with a spoon resting at the bottom—proof that everyone went back for “just one more bowl.”

What makes it so memorable isn’t complexity, but balance: sweet tomatoes, soft noodles, savory broth, and the gentle richness that slow cooking brings out over time. It’s the type of recipe you don’t rush, and you don’t really need to.

Here’s how to make it step by step.

Amish Slow Cooker 5-Ingredient Tomato Noodle Soup

Ingredients (only 5 essentials)

1 large can (28 oz) crushed or diced tomatoes
4 cups chicken broth (or vegetable broth if preferred)
1 medium onion, finely chopped
1 teaspoon salt (adjust to taste)
2 cups egg noodles (dry, uncooked)

That’s it. No complicated seasoning list, no long prep—just pantry basics doing all the work.

Step-by-Step Method

Step 1: Prep the slow cooker base

Start by adding the crushed tomatoes directly into the slow cooker. Don’t worry about blending or smoothing them out—the slow simmer will break everything down naturally.

Next, pour in the broth. Stir gently so the tomato and broth begin to combine into a rich red base.

Step 2: Add the aromatics

Finely chop your onion and add it straight into the slow cooker.

This is where the soup starts developing its signature Amish-style depth. As it cooks slowly, the onion softens completely and blends into the broth, leaving behind sweetness instead of sharpness.