Banana Marshmallow Slice

My mom used to bake each one of her children's favorite treats for Christmas...what mother wouldn't! Mine was the wonderful pinwheel cookies that Betty posted the other day. One of my sister's favorites was Banana Marshmallow Slice, a recipe she gave to my Mom and which soon became a Christmas regular. It's beautiful colours and sweet topping are just perfect to put on a plate of various squares.

Banana Marshmallow Slice

1/3 lb margarine (about 1 1/3 square)
1 1/2 cups flour
1 tbsp icing (pwd. ) sugar
1/2 tsp salt
30 marshmallows
1 mashed banana
15 maraschino cherries, halved

Cream margarine and icing sugar; then work in flour and salt. Pat into an 8 x 8 pan. cook at 324 F. for 25 minutes. Cool. Put the marshmallows and mashed banana in a double boiler stirring occasionally. (I put mine in the microwave for 30 seconds...stir, ten seconds and then stir...etc. until all melted. Then I add the mashed banana and made sure it is well blended.) Remove from heat and add 15 or 20 sliced maraschino cherries. Put on the first mixture already baked. Place in the fridge. When set, ice with butter icing below.

Buttercream Decorator's Frosting:

(yields 4 cups - my mom used to decorate cakes and thus the large amount. I used 1/4 this recipe to ice the slice. Be sure to keep this icing recipe on is the best to decorate cakes and does not 'melt' or run like many others.)

1/2 cup veg. shortening
1 1/2 tsp vanilla
1/4 cup and 1 tbsp milk
1/2 cup butter or margarine
5 1/2 cups icing (pwd.) sugar

Cream butter and shortening. Add vanilla. Add pwd. sugar one cup at a time. Add milk last, beating at high speed. Blend until smooth. Keep covered with a damp cloth (I believe she meant, if you are decorating a cake otherwise I would place in a sealed container for storage) and refrigerate when not using. Lasts up to a week with rewhipping.


  1. this square looks delicious, Trish! Another treat from your kitchen. Some day I will join you there..

  2. i echo betty...another yummy treat and i would love to sit at your kitchen table and visit over a good cup of coffee and a yummy treat from your handi work..:-)

  3. The flavors sound good together! Is this fattening? hee hee hee...or ho ho ho!

  4. this looks so delicious and decadent!!! bananas are my favorite fruit in the world. i think i'll have one now actually.

  5. Mmmmm..Trish, I think those squares would be my favorite treat!
    I think I'll join Betty and Charlotte at your the coffee on?

  6. This sounds delicious. How much mashed banana should I use? I didn't see it in the ingredient list.

  7. Oh are right Amanda...I forgot. That would be one mashed banana. I have now inserted it into the ingredient list...oops :)

  8. mmhmm you can make these into tiny tarts as well and they freeze well. My new favorite

  9. This is a WONDERFUL recipe site! This banana slice recipe sounds delicious. I am uncertain about adding the banana. The recipe states to melt the marshmallows and bananas and then to add a mashed banana. Does that mean two bananas are used for the recipe or that the mallow-banana mixture is stirred again? Thank you!

  10. mm yummy, this with a big pot of tea. Thanks for sharing this recipe.