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How to crumble tofu
Purchase extra-firm tofu.
You should be able to find tofu at any local grocery store, supermarket, or health-food store. Tofu is packaged according to the degree of hardness, ranging from extra soft to extra firm.
Silken or soft tofus will not crumble well, so purchase a very firm tofu. Tofu needs to be refrigerated, so check the store's refrigerated aisles, especially in the " organic " or " vegan " sections.