Combine softened butter and sugar in the bowl of a stand mixer (if using coconut sugar, blend in a blender until fine).
Add molasses, vanilla, and egg and mix well.
In a separate bowl combine flour, oats, baking soda, salt, and spices.
Slowly mix the dry ingredients into the wet ingredients until fully combined.
Chill in the fridge for at least an hour, until the dough is firm.
Preheat oven to 350 degrees F.
Line a baking sheet with parchment paper.
Scoop out cookie dough into your hands and form into a ball.
Evenly space cookie dough onto baking sheet and bake for 10-12 minutes.
While the cookies are cooling, combine all cream filling ingredients in the bowl of a stand mixer. Beat on high speed until fluffy.
Allow cookies to cool completely before filling cookies with icing.
To assemble cream pies, take one cookie and fill with a scoop of icing.
Take another cookie and place it on top of the icing, gently pressing down.
Repeat with remaining cookies.