Preheat oven to 375.
Using 12 (8 oz) mason jar lids, turn the metal piece so the plastic rim is facing down. Spray inside and out with non-stick cooking spray.
In bowl mix together your butter, milk, egg and vanilla and set aside.
In another bowl mix together your flour, sugar, baking powder and salt and stir until combined.
Stir in your milk mixture until blended.
Fold in your strawberries and chocolate chips until evenly distributed.
To make your streusel topping combine all ingredients until crumbly, set aside.
Distribute batter evenly among mason jar lids making sure too not fill too full or it will overflow which is fine, but makes them harder to remove from lids.
Sprinkle each with streusel topping and sprinkle with decorators sugar.
Bake in preheated oven for 35-20 minutes or until golden brown and they spring back when touched.
To make your glaze combine all ingredients in small bowl and whisk together, drizzle over tops of muffin tops.
Serve and enjoy!