In a bowl, mix together yogurt and baking soda using a spoon and set it aside till it becomes foamy and bubbly.
Add sugar, oil and vanilla extract to the above mixture and whisk till everything is well combined.
Now add the dry ingredients - flour, cocoa powder, and baking powder and whisk to form a smooth cake batter.
Now, pour the chocolate batter into a mould respective of the cooking method used. Use a silicon or glass dish for microwave and silicon or aluminium mould for the other two methods.
The cake will bake at regular setting for 7 mins in the microwave. The cake will bake on low-medium heat for 50-60 mins on a gas stove. The cake will bake at 180 degrees Celcius for around 30 mins in an air fryer.
Recipe by Bake with Shivesh at https://bakewithshivesh.com/how-to-make-chocolate-cake-without-oven/