Preheat the oven to 190°c (170fan/ Gas 5/ 375F) and line a 12 hole muffin tin with muffin cases.
Place the dry ingredients in a large bowl.
140 g Caster Sugar, 200 g Plain Flour, 1 teaspoon Bicarbonate of Soda, 1 teaspoon Cinnamon
Whisk together the wet ingredients in a large jug and gently mix them into the dry ingredients with a wooden spoon.
100 ml Plain Yogurt, 2 Eggs, 140 g Butter
Fold the chopped apple and blackberries through the muffin batter.
1 Bramley Apple, 100 g Blackberries
Divide the batter equally between the 12 muffin cases. Bake in the oven for 16-18 minutes until cooked. Dust with icing sugar once cool.
1 tablespoon Icing Sugar