Question

from where do bakers get yeast for making cakes ​

Answer 1

Answer:

For this reason, many bakers have substituted Dry Yeast in their baking. Cake yeast is currently sold in limited areas to consumers as RED STAR cake yeast in a 2 oz. package. Cake Yeast is very versatile and performs well in all your recipes, including use in bread machines.

Answer 2

They sometimes use special types of chemicals or baking powder is preferred to yeast for making cake which they buy from other types of stores/shops.