In a mixer put butter and sugar and allow it to mix for 20mnts

Add egg to d mixture to mix for 5mnts

Den add vanilla extract and flour in small quantity until it finish and mix well until smooth

Set ur oven On den u put d batter in ur container

Den u place in d baking tray and close d door for baking

U can check it by putting a toothpick to see whether it is baked