A newbie asking for a cupcake advices

[Fahmiaa]

Hi everyone.

I am a newbie in baking. I have a plan to give my friend some cupcake, I have made some following the recipe I found online.

This is the result

I wonder if the cupcake I've made are correct and appropriate for a gift. What about the texture? Is it under or overcook? Etc. Etc.

To note here

• I did not use butter, I use margarine instead.
• I also put a little bit of oil.
• The recipe call for cocoa powder, but I skip it.
• I run out of baking powder, so I substitutes with (roughly) 1/4 tsp baking soda and 1/2 tsp cream of tartar (for each tsp of baking powder).
• I also did not use an oven, I use a thick metal pot oven on a stovetop (medium heat for 15 minutes), I'm not sure what it's called, a dutch oven?

I thank you all in advance, all help and advices are appreciated.