Make Muffin Batter
Mix all the dry ingredients together with a whisk to mix them well.
Add the wet ingredients and mix until the flour is just moistened. The batter will be lumpy, be careful not over mix.
Spoon batter into greased muffin tins. Then make the nut crumble topping.
To Make the Nut Crumble Topping
Mix together the brown sugar, chopped nuts and cinnamon in a bowl.
Sprinkle on top of the muffin.
Bake 400 degrees for 15 to 20 minutes until golden brown. I like to bake my muffins in the upper third of the oven so the tops get nice and golden.
Let cool about 3-5 minutes and then remove from muffin pans and enjoy.