Preheat oven to 350 degrees Fahrenheit (175 degrees Celsius).

Mix all ingredients for the cinnamon

mixture into a paste. Put the mixture into a

pastry bag or food storage bag. Set aside.

Mix the flour, baking powder, cinnamon,

and salt in a bowl.

In a separate bowl, mix the butter or oil with the sugar. eggs and vanilla and mix well. Add the dry ingredients mixture and mix well.

Transfer batter to a 9 x 13-inch (23 x 33-

centimeter) baking pan and pat down. Cut a

small hole in the corner of the bag with

the cinnamon mixture and squeeze little

mounds onto the blondies batter. Using

a knife, make a marble pattern. (The

marble pattern won’t look like a nice

pattern as it does in marble cake, which

is okay.)

Place the pan in the oven and bake for

30 minutes until lightly golden. Allow to

cool.

Mix all ingredients well. Smear over the blondies.

Cool again and cut into squares.