1. Pre heat oven to 180˚C. Line your muffin pan with cupcake holders.
2. Mix together all your muffin batter ingredients except blueberries, giving them a quick whizz with an electric beater or stand mixer. (I use paddle attachment in Kenwood)
3. In a seperate bowl, rub together all your topping ingredients to make a nice crumble which should resemble rough breadcrumbs. A few chunky crumbs is desirable!
4. Fold blueberries into your muffin batter now, and spoon mix into each muffin tin – only fill half way into each cup.
5. Now time to add that delicious cinnamon topping… On top of each muffin, spoon a generous amount of crumble topping which should then fill the other half of your unbaked muffin cup.
6. Bake in your pre heated oven for 20mins.. They should be deliciously golden brown! Remove and allow to cool on a rack… Store in air tight container… And ENJOY!