If you’re diving into sourdough baking this season, you’ve probably encountered the exciting moment when your starter — like Bertha — is ready to explode with activity. This bubbling, frothy sign means your sourdough starter is at peak fermentation, full of active wild yeast and bacteria that give sourdough its signature flavor and rise. To keep your starter healthy and vigorous, it’s important to feed it regularly with fresh flour and water, maintaining the right hydration and temperature. Bertha’s readiness suggests she’s been well cared for, with the perfect balance of warmth and nourishment to encourage yeast growth. When you see ‘Bertha is ready to explode,’ it’s time to prepare your dough. Incorporate the starter as the key ingredient for your bread, letting it ferment and develop complex flavors thanks to the natural fermentation process. The ‘explosion’ of bubbles also means more rise and better dough texture. For beginners, documenting these moments through a vlog or journal — just like in this Vlogmas Day 17 episode — helps track the starter’s progress and understand its needs. Sharing tips, photos, and challenges creates a helpful community that supports everyone’s sourdough journey. Whether you’re baking for holiday gifts or family meals, a lively starter like Bertha ensures your sourdough bread will be flavorful, airy, and wonderfully crusty. Happy baking and enjoy the natural miracle of sourdough fermentation!