Cinna-bun Cake

Prepare a 9-inch x 13-inch baking pan by spraying with non-stick cooking oil or, if you prefer, coat the pan with butter.
In a large bowl, mix all of the base ingredients, with the exception of the butter, together until thoroughly combined.
Add the melted butter last and pour into the prepared pan; set aside,
To prepare the topping:
In a small bowl, mix all of the topping ingredients together; mix well to combine.
To assemble the cake for baking:
Drop topping, by teaspoonful over the base, as evenly as you can, over the entire base.
Use a butter knife and swirl the topping into the base.
Place into the pre-heated oven and bake for 28 – 30 minutes.
To prepare and use the glaze:
While the cake is baking, using a small bowl, prepare the glaze by mixing all ingredients until completed combined; set aside.
Remove cake from oven and glaze the cake while still warm.