More Sourdough Starter

This is the old-fashioned potato flake sourdough starter, the kind passed around in jars with scribbled feeding instructions on the lid. Three ingredients, no fancy flour, no scale required.

Water, sugar, and instant potato flakes go into a loose-lidded jar and sit somewhere warm (the top of a water heater is the classic spot) for three to four days. You’ll know it’s ready when it smells sharply yeasty and shows bubbles on the surface. Feed it once to wake it up, then bake.

This sweet starter is the backbone of friendship bread, soft sandwich loaves, and fluffy rolls. It behaves differently from a flour-based wild-yeast culture: milder tang, more lift, and a slightly sweet crumb thanks to the sugar feeding the yeast.

Kitchen Tips

• Use a glass jar or ceramic crock, never metal, which can react with the acidic starter.
• Cover loosely with cheesecloth, a coffee filter, or a lid set on top but not screwed down. The starter needs to breathe as it ferments.
• Warmth is key. A cold kitchen slows fermentation dramatically. Aim for 75 to 85°F (24 to 29°C).
• Feed every 3 to 5 days once established: stir in more water, sugar, and potato flakes, then let it bubble up again before baking or refrigerating.
• Discard a cup before each feeding or share it with a friend. That’s how these starters stay alive for decades.

Variations

• Add a teaspoon of active dry yeast to the initial mix for a faster, more reliable rise if your kitchen runs cool.
• Swap half the sugar for honey once established for a softer, slightly floral flavor in finished loaves.