Baking powder usually contains cream of tartar, so this is the best swap. To make it, mix together 1/4 teaspoon of baking soda and 1/2 teaspoon of cream of tartar. Since cream of tartar is ...
Preheat your oven to 175°C (350°F). Line a baking pan with parchment paper and pour the batter evenly. Bake for 25-30 minutes ...