I wanted to make a very fluffy chocolate cake so I checked out recipes online. I did it and d cake rose so much and later fell over d pan and inwards making d oven messy. In d end it used over an hour in d oven before it was done. D ish is d cake fell and hence reducing d size

Here is my recipe:
2cups flour
2cups sugar
3tsp baking powder
1/4 tsp salt
125g cocoa powder
250g butter
5 eggs
1 cup of milk
1/4 cinnamon powder
I mixed d dry ingredients, beat butter and sugar till fluffy, added d eggs one at a time b4 adding d dry ingredients.

Then I added d milk and put in d pans and baked at a heat of 250 degrees.
What went wrong?

I would say that the eggs coupled with the 3tsp baking powder appears too much. If I'm not mistaken, egg adds volume. So if u r using that much eggs I would suggest u reduce the baking powder to 1/2 tsp and maybe add 1/2 tsp baking soda.

That's my opinion let's see what others have to say.

If your batter spills over your baking pan, you have simply used a baking pan that was too small. And like @ meddler said for chocolate cakes you need to add bicarbonate of soda, so do what she advised and use a bigger pan size.
I hope this helps.

The pan was too small for ur batter

They have said it all,what i can point out from your comment is that the pan you used to bake is too small and point no 2 is that may be you are opening the oven from time to time which is not suppose to be y baking

I think the baking powder used was too much

and just out of curiosity how sweet was the cake?

Avoid opening the oven unnecessarily when baking cakes. Leave to bake for at least 30min before opening the oven except for cupcakes. Frequent opening causes cakes to drop.

check out www.auntysazzy..com for baking tips and tricks.

geeky_babe: I wanted to make a very fluffy chocolate cake so I checked out recipes online. I did it and d cake rose so much and later fell over d pan and inwards making d oven messy. In d end it used over an hour in d oven before it was done. D ish is d cake fell and hence reducing d size

Here is my recipe:
2cups flour
2cups sugar
3tsp baking powder
1/4 tsp salt
125g cocoa powder
250g butter
5 eggs
1 cup of milk
1/4 cinnamon powder
I mixed d dry ingredients, beat butter and sugar till fluffy, added d eggs one at a time b4 adding d dry ingredients.

Then I added d milk and put in d pans and baked at a heat of 250 degrees.
What went wrong?

to me there is smth quite wrong here. let me study it and gt back to u.