To make sourdough lighter and fluffier, focus on building strong gluten with adequate stretch and folds, ensuring a vigorous starter, using higher hydration, extending bulk fermentation ( letting dough rise more), and achieving excellent oven spring with a very hot oven and steam (like a Dutch oven or steam pan) for a big initial lift. Adding a touch of fat (oil/butter) or sugar can also enhance softness and moisture.
I get my sourdough loafs the fluffiest when I preheat to 500, lower to 450 once the loafs are in the Dutch ovens, 20 minutes at 450, then lower to 400 for ten with the lid on, then 20 minutes with the lid off. It's a pain but I swear by this method.
#1 — Use a lighter flour.
Whole wheat flour (hard red) is the heaviest flour I know. Now, the hard white variety of whole wheat is lighter and sweeter, so that one thing could improve your bread. If you go with spelt or even einkorn, you will get even lighter results, in my experience.
Dense sourdough almost always points to under fermentation or starter issues. When the yeast cannot produce enough gas, or the gluten network is not strong enough to hold that gas, the loaf bakes tight and heavy. Signs of dense or under fermented sourdough: Tight crumb with gumminess.
Most likely when this happens, it's not you - it's your starter. If your loaf is dense, has uneven holes and a gummy texture, most likely there wasn't enough active wild yeast in your starter to make the bread develop and rise during baking. This can be the case even if your starter seems really happy and bubbly.
Use a circular motion to roll the dough, folding it over itself until it forms a smooth and round ball. This will help develop the gluten strands in the dough, which will make the bread light and fluffy.
While your sourdough is proofing during bulk fermentation the acidity level slowly rises. While this imparts your bread with its typical sourdough flavor, it also has a strengthening effect on your sourdough. So if you're doing too many sets of stretch and folds that acidity will over-strengthen your dough!
Simply put, you have to control the temperature of the dough. Allowing ample time for your bread dough to rise and the yeast to form will create the holes in the bread that give it a lighter texture. Letting your dough get puffy and grow before it goes into the oven is critical.
The biggest mistake beginners make with sourdough is impatience, specifically baking with a starter that isn't strong enough or rushing fermentation, leading to flat, dense bread; they often try to bake too soon, don't let dough proof long enough, and fail to develop dough strength or learn to "read the dough" (look/feel) rather than just the clock, plus starting with overly high hydration is a common pitfall.
Overproofed loaves typically feel very sticky, they don't want to maintain their shape, and when baked can come out looking very flat. If they are WAY overproofed they will also have a very gummy interior.
Long Cold Proof. After the bulk fermentation, you'll shape the dough, and store it in the fridge ideally for 24 hours but it can hang out there for 48 hours or even a bit longer. This long, cold proof will make for a much lighter, open, airy crumb.
Over proofing can be just as detrimental to the density of your bread as under proofing. Over proofed bread means that the carbon dioxide has escaped the structure. The gluten structure caved and the air in your loaf has escaped. This results in a denser loaf.
Fortunately, one of the most glaring baking problems has an easy solution: ensuring your bread stays moist. The key is twofold: use quality ingredients and let the dough stand overnight. If you're using storebought flour, opt for “bread flour,” which will hold better in heat and help create a more tender crumb.
A good sourdough bread has a deep golden, crackling crust, a light and airy interior (crumb) with irregular holes, a pleasant tangy flavor, and a chewy texture, achieved through a long, slow fermentation with flour, water, and salt, using a strong, active starter. Key elements include proper fermentation, gluten development, sufficient hydration, and avoiding additives like oil or milk for authentic taste and texture.
Mixing baking soda into the dough at the shaping stage (just after the bulk ferment) will give sourdough bread an extra boost and help it become lighter and more airy. Baking soda is a heavy alkaline and reacts with the strong acidity of sourdough.
What type of flour is best to use for sourdough bread? If you're a complete beginner, organic strong white bread flour made from hard wheat is the best option. This flour will; give you the easiest and strongest gluten development, be easiest to knead and shape and give the best rise in the oven.
Egg has protein, fat, water and while the fat and water soften the crumb, the protein helps with strengthening the gluten and capturing more CO2. Eggs are also helping with leavening the dough which adds to the rise. Doughs that have more egg usually rise more, so go ahead and play around a bit!
Here are the big errors to avoid when working with sourdough.
An overfed starter can be too diluted and it will be very watery. Your workers are there, they are just overwhelmed with too much food and water.
For a fluffy bread texture, the key is to let the bread rise long enough.
Active Dry Yeast: Requires proofing in warm water before use. It's commonly used and works effectively to create a fluffy loaf. Instant Yeast: Can be mixed directly into the dry ingredients without the need for proofing. It generally produces a quicker rise.
Many of these breads, especially packaged ones, are made with a ton of chemical additives such as calcium propionate, amylase, and chlorine dioxide which help keep them soft, light, and fluffy for days.
Stretching should feel like mild tension, not pain. If you're wincing or holding your breath during a stretch, that's your body's way of saying, “Hey, ease up!” If a stretch hurts, stop.
The biggest mistake with a sourdough starter is impatience, primarily by using it before it's strong enough (weak starter) or discarding too much/feeding inefficiently, which weakens it further, leading to flat bread; you must give a new starter weeks to mature and consistently feed it at its peak for proper leavening power. Other common errors include using chlorinated water, incorrect water temperature, or ignoring temperature for sluggish activity.