Preheat the oven on 180 degree

Whisk the butter and sugar until become creamy texture

Add egg,vanilla, milk,lemon zest and lemon juice

Whisk till the components are combined well

Mix the flour, baking power and salt then add to the mixture

Keep aside 1 tbsp of flour to cover the blueberry

After mixing the cake properly and the blueberry and stir lightly

Pour in the tray & bake on 180 degree