Preheat oven to 375 F.
In a large bowl beat butter, granulated sugar, and brown sugar until fluffy.
Beat in eggs and vanilla until smooth.
In another bowl combine flour, baking soda, cinnamon, and salt.Gradually mix in dry ingredients and then fold in oats and raisins.
Drop small rounded teaspoons onto a baking sheet and bake for 8-10 minutes or until lightly golden brown. Let cool.
For the frosting, seep 3 black tea bags in the 1/4 cup of boiling water. After it has cooled, squeeze the water from the tea bags into a large bowl.
Add butter and slowly beat until creamy and smooth.
Slowly add sugar and once combined beat on medium-high for 1 minute until light and fluffy.
With a spoon or in a piping bag swirl frosting on cookies and sandwich together.
Eat like a chubby kid on a diet.