Step 1

In bowl, or mug itself mix together your flour, sugar and baking powder and salt.

Step 2

Stir in your butter, milk, banana, egg and vanilla until combined.

Step 3

Microwave for 3 minutes, checking halfway through.

Step 4

Let sit to cool.

Step 5

Combine all ingredients in small bowl and microwave until bubbly.

Step 6

You may need to stop a few times as this likes to bubble very quickly.

Step 7

Keep microwaving for about 30 seconds to 1 minutes.

Step 8

Stir to combine completely.

Step 9

Drizzle over the top of the cake.

Step 10

Top with sliced bananas if desired and enjoy!