I would probably avoid using regular tofu in place of silken tofu for this recipe. It is not about the flavours, as regular tofu will still pair well with fried garlic, black beans and soy sauce. It is more about the texture of silken tofu that makes this Chinese tofu dish so delicious. Plus, I would steam regular tofu first before eating. I would not eat regular tofu straight from the packaging. Generally speaking, silken tofu cannot be used interchangeably with regular tofu in most recipes.