To die for blueberry muffins - all recipes.com

A well used recipe. the notes on the side say DO NOT double the crumb topping

I make the crumb topping before the muffin batter.

All dry ingredients together - lumpy baking powder so I sifted it in.  NO need to sift flour; it says on the bag - pre-sifted.  Just level into dry measure.  Robin Hood has excellent quick videos on baking method, equipment etc.

Liquid ingredients all in one.  Liquid oil is considered a healthier choice over solid.

Have your oven is preheated and your pans are ready, once liquid is added you want to get baking  into the oven.

I use frozen berries, leave then frozen until use and barely stir them in (as with any muffin recipe)

It looks more like a dough than a batter.

I have a 6 portion  oversize muffin tin

I also own a muffin top pan - shallow and allows for more 'top'

I make crumb topping first so I am ready to go when the dough is ready.

Allow to cool slightly in pan - leave then in too long and they will sweat!

run a spatula around the edges (I use my off set spatula from cake decorating)