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What Is Sourdough Starter?

Created March 13, 2025
Bowl of bubbly sourdough starter surrounded by ingredients and a kitchen towel.
Discover the secrets of sourdough with our complete guide on what is sourdough starter, the ancient method of leavening that transforms simple ingredients into bakery-quality sourdough bread and other delicious creations. This article dives deep into how to create, maintain, and cook with a sourdough starter, offering everything from basic tips to innovative recipes like sourdough pancakes that you can make at home. Whether you're a novice baker or a seasoned pro, learn why nurturing your own sourdough starter brings a sense of accomplishment and flavor to your kitchen creations.

Few kitchen projects are as rewarding as mastering the art of sourdough. Whether you're aiming to bake that perfect golden loaf, whip up fluffy pancakes, or explore countless other recipes, understanding how to nurture and use a sourdough starter is the first step.

This guide dives into everything you need to know about sourdough starters—what they are, how to cultivate them, and the delicious ways they can elevate your baking. Bring some warmth and versatility into your kitchen with our tips and inspirations while discovering how Pillsbury can help you make it easy.

Sourdough Starter

At its simplest, a sourdough starter is a living, bubbling culture made from flour and water. This mixture captures wild yeasts and beneficial bacteria naturally present in your environment, sparking a fermentation process. As the yeast feeds on sugars in the flour, it releases carbon dioxide, creating the airy texture and tangy flavor that sourdough bread and other recipes are loved for.

Unlike commercial yeast, which is a one-time-use leavening agent, a sourdough starter can be nurtured and reused indefinitely when properly maintained. This makes it a sustainable, cost-effective, and flavor-packed addition to your kitchen. With a little patience and care, your sourdough starter can be a baking ally, turning everyday moments like breakfast or dinner into opportunities for homemade comfort and creativity.

What Is Sourdough?

Sourdough refers to baked goods that use sourdough starter instead of commercial yeast for leavening. This traditional baking method, dating back thousands of years, has a devoted following thanks to its rich flavor, artisanal textures, and versatility. From crusty sourdough bread to golden waffles, sourdough-infused creations continue to stand out in today’s kitchens.

Recent trends also celebrate sourdough for its potential health benefits. Natural fermentation may support digestion and enhance nutrient absorption, but outcomes depend on individual dietary needs. Sourdough has also been growing in popularity for perfect Avocado Toast recipes.

How to Make a Sourdough Starter

Creating a sourdough starter from scratch is simpler than you might think. With just a few ingredients, you can have a thriving, bubbling culture ready for your baking adventures in about a week.

Ingredients

  • 1 pkg. active dry yeast
  • 2 cups warm water
  • 3 1/2 cups all-purpose flour
  • 1 tablespoon sugar or honey

Instructions

Day 1: Bloom the Yeast

Dissolve yeast in 2 cups warm water (105 to 115°F.) and let it stand for 5 minutes.

Day 1: Mix and Let Sit

Add your flour and sugar to the bowl. Stir until no dry flour remains, then loosely cover the container with a breathable lid like a coffee filter or cheesecloth. Set it aside at room temperature, between 70–85°F is best.

Day 2: Feed and Mix Your Starter

Remove half of the starter mixture if needed (to avoid overgrowth) and add another ½ cup each of fresh flour and water. Stir well and cover loosely. You may begin to see bubbles forming—this indicates the fermentation process is starting!

Days 3–7: Monitor and Mix

You should mix the starter once per day until it is ready for its first use.

Continue feeding your starter as needed. Over time, you’ll notice your starter becoming more active, with more bubbles and a tangy aroma. Between days 5 and 7, your starter should double in size within a few hours of feeding and be ready to tackle your favorite recipes.

When the starter is ready for use, it should be bubbly and may have a yellow liquid layer on top. Stir well before using.

Looking for a shortcut? Pillsbury’s Refrigerated French Bread Dough is a lifesaver for busy days when you crave the warmth of fresh-baked sourdough-inspired bread without the effort of maintaining a starter.

How to Care for a Sourdough Starter

Once your starter is active, caring for it becomes part of your routine. Think of it as a low-maintenance pet that rewards you with incredible flavors!

Feeding Schedule

  • Room Temperature: Feed your starter daily to keep it bubbly and strong.
  • Refrigeration: For less frequent baking, store your blossomed starter in the fridge and feed it weekly. Simply bring it back to room temperature and feed it before using it in a recipe.

Healthy Starter Maintenance

  • Your starter should smell tangy and look bubbly when it’s healthy. If you see a clear or grayish liquid (called “hooch”) on top, simply stir it in and feed your starter.

Discarding Starter

The term discard can be confusing as it can refer to the starter that is removed and set aside in the feeding process or throwing away extra starter. When starter is fed, a portion of the starter is removed (the discard). The discard can either be thrown away, stored in the refrigerator, or used immediately in a recipe. Avoid mold, off-putting smells, or colors like pink or black—these are signs your starter has gone bad and needs to be trashed.

What Can You Make with Sourdough Starter?

The possibilities are endless when it comes to using sourdough starter in your kitchen. Here are some ideas to inspire your next creation:

Slices of sourdough bread with butter and marmalade on a blue polka dot plate, next to a loaf of bread and a jar of marmalade.

Classic Sourdough Bread

Experiment with flavor add-ins like fresh herbs, roasted garlic, or a sprinkle of cheese for a personalized twist.

Stack of fluffy pancakes with butter and syrup, served with bowls of strawberries and blueberries.

Sourdough Pancakes or Waffles

Use discard to create fluffy pancakes or waffles with a tangy kick.

Sourdough Pizza Crust

Upgrade pizza night with a sourdough crust. Be sure to pre-bake your crust to avoid undercooked sections.


Ready to dive into the world of sourdough? Pillsbury is here to help you through every step of your journey, from nurturing your starter to transforming it into baked masterpieces, we'll help to bring heartfelt homemade goodness to the table.