Preheat oven to 425 degrees
Combine dry ingredients in large mixing bowl: Flour through baking powder
In a medium mixing bowl combine buttermilk, egg and vanilla extract. Whisk well.
In a small bowl or ramekin combine melted butter and honey, allowing butter to cool off slightly after melting butter
Once butter and honey combo only slightly warm, add to bowl with buttermilk mixture. Whisk till well combined
Add buttermilk mixture to dry mixture bowl and combine till mostly wet mixture.
Fold in blueberries.
Fill greased muffin pan with batter, they will each be about half full (no paper liners necessary)
Make Crumble Topping at any time by combining Topping ingredients in a small bowl with a fork or fingers (I like to just manipulate the butter with the sugar, flour and cinnamon with my fingers until it becomes a pasty, crumbly consistency.
Top batter in each muffin cup with some of the crumble mixture.
Bake muffins in oven for 5 minutes at 425 F.
Then lower the temperature of the oven to 375 F and bake another 15 -17 mins or until toothpick comes out clean and dry. Check at 15 minutes to be safe. (Please remember different pans, oven and other factors can change your baking time)
Cool on rack in pan for 10 minutes, then enjoy!