Buttermilk Pancakes

I used to get the packet mix pancake till I realised that homemade ones are easy to make and tastier.
This recipe makes around 4 to 5 medium sized pancakes, enough for 2 people for breakfast.

For the Buttermilk:
1 cup milk at room temperature
Add 1 tsp vinegar or the juice of 1/2 lemon
Let it rest for 5 minutes. It will curdle.

Pancake batter:
1 cup flour
1 egg
1 tbsp butter
1 cup Buttermilk
Additional butter to cook

Optional (any 1):
1 mashed Banana
1/2 cup blueberries

1/2 cup chocolate chips

Mix all the ingredients together, but not too smoothly. The batter should be a bit lumpy. Heat a pan and add some butter to the base. Pour a layer of the batter. Once it starts to set at the bottom, flip it and wait for a minute or so to cook completely. Remove from pan. Repeat for the rest of the batter.

Toppings (single or combine your favourites) :
Maple syrup (avoid the sugar syrup available in most stores)
Honey 

Chocolate syrup
Jam
Butter
Fruits (bananas, berries, apple, poached pears, etc)
Cinnamon