Home made blackberry muffins

For a delicious home made blackberry muffins,this is a suggested simple recipe;

Ingredients
75g unsalted butter
250g self-raising flour
1tsp baking powder
½tsp bicarbonate of soda
75g caster sugar
200ml milk
1 egg
1 punnet blackberries
Method
Preheat the oven to 200°C, 400°F, Gas 6.
Grease a muffin tray or line with muffin cases and set aside. Melt the butter and reserve.
In one bowl combine the dry ingredients. Pour the milk in to a measuring jug and crack in the egg and whisk with a fork to amalgamate. Pour the liquid ingredients into the dry ingredients, stirring with a wooden spoon. The batter should remain somewhat lumpy – do not whisk until smooth.
Tip the blackberries into another bowl and lightly crush with a fork so that some remain whole and some break down. Stir into the batter, making a ripple effect. Pour into the muffin cases and bake in the oven for about 20 minutes.
Remove to a wire rack and allow to cool a little.
Questions,obserVations and suggestions are welcome :)
Happy cooking!