• Flour: 1c per 1c
• Baking Powder: as per recipe - 1tsp/cup
• Shortening: Replace with Water
• Salt: Remove

https://www.leaf.tv/articles/how-to-substitute-bisquick-for-flour-leavener/

One Cup Bisquick =

• 1 C Flour
• 1.5 tsp Baking Powder
• 0.5 tsp Salt
• 1 Tbs Oil/Butter

https://cooking.stackexchange.com/questions/41017/is-bisquick-the-same-as-self-rising-flour