Step 1

In large bowl, beat margarine, brown sugar, granulated sugar, molasses, vanilla and eggs.

Step 2

Add flour, salt, baking soda and cinnamon. Mix in the oats.

Step 3

PRO TIP: Use a food processor to process the oats into smaller pieces. I usually give it a few pulses (you don't want fine crumbs).

Step 4

Drop by ONE tablespoon onto a parchment lined cookie sheet.

Step 5

Bake 8-10 minutes in a 350 degree oven, until just starting to brown around the edges. DON’T OVERCOOK!

Step 6

After cookies have cooled, combine hot water with salt and mix until salt is dissolved.

Step 7

In large bowl, beat marshmallow fluff with Crisco, powdered sugar and vanilla. Beat on high until fluffy. Add in salt water and mix until well combined.

Step 8

Spread filling on one cookie and press second cookie on top. Enjoy!