In microwavable mug combine the butter, milk, sugars, flour, & baking powder. Stir to combine. Using the back of your spoon form a hole in the center of the batter & place the jam inside of the hole. Lightly spoon the batter over the jam so that it is completely covered. Place in microwave for 45-50 seconds.
While the cake is cooking, combine icing ingredients in a separate bowl.
Let cake cool for 1-2 minutes & then spoon icing over the top. For the full pop-tart effect leave a border of cake around the sides. Immediately top with sprinkles, serve, & enjoy!
Supplies
microwavable mug measuring cup
Recipe by Public Lives, Secret Recipes at https://publiclivessecretrecipes.com/2017/02/1-minute-blueberry-pop-tart-mug-cake-recipe.html