DIY Twinkies Gelson's

Ingredients

• Cooking spray
• 1 cup cake flour
• 1 tsp baking powder
• ¾ cup granulated sugar
• ½ tsp kosher salt
• ¼ cup vegetable oil
• ¼ cup water, room temperature
• 1 tsp vanilla extract
• 3 large Gelson’s eggs, separated, divided
• ¼ tsp cream of tartar
• ⅓ cup heavy whipping cream
• 1 Tbsp confectioners’ sugar
• ½ tsp vanilla extract
• Kosher salt
• 1 7-oz container marshmallow fluff (1 ½ cups)