chocolate espresso whoopie cookies

Ingredients For chocolate espresso whoopie cookies

• 1/2 c

  butter, room temperature
• 1 c

  sugar
• 1 lg

  egg
• 1 tsp

  vanilla extract
• 1 3/4 c

  flour
• 1/2 c

  cocoa powder
• 1 1/4 tsp

  baking soda
• 1/8 Tbsp

  salt
• 1 c

  buttermilk
• 4 oz

  cream cheese
• 1/2 c

  marshmallow cream
• 1 tsp

  instant coffee powder
• 1/2 c

  heavy cream, whipped
• 1/2 c

  mini chocolate chips
• 1/2 c

  crushed toffee candy bars