Is two packages of dry yeast equivalent to a small cake yeast?

It's tricky to give a definitive yes or no answer because "small cake yeast" can be a bit ambiguous.

Here's why:

* Yeast comes in different forms: You're talking about active dry yeast (the small packets) vs. cake yeast (usually a block or cylinder).

* Yeast strengths vary: Different brands and types of yeast have different strengths. A "small" cake yeast could be a different size from another brand's "small" cake yeast.

To get a good answer, you need to know:

* The size of the cake yeast: How many grams or ounces is the cake yeast?

* The type of dry yeast: Is it active dry or instant yeast? (Instant yeast is more potent per weight).

General Rule of Thumb:

* Active dry yeast: 2 packets of active dry yeast (usually 2.25 grams each) are roughly equivalent to 1/4 ounce of cake yeast.

* Instant yeast: 1 packet of instant yeast (usually 2.25 grams) is roughly equivalent to 1/4 ounce of cake yeast.

If you're unsure, it's best to consult the recipe or instructions for the cake you're making. They will often provide instructions for substituting between yeast types.