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oatmeal cookie bar with toasted marshmallow fluff topping

oatmeal cream pie bar

Print Recipe
these oatmeal cream pie bars are a cozy twist on the classic treat—thick, chewy, molasses-kissed oat bars layered with fluffy marshmallow cream. they're easy to make, deeply comforting, and perfect for sharing (or not)
Course Dessert
Keyword bars, easy, make ahead, oatmeal, winter recipes
Prep Time 25 minutes
Cook Time 23 minutes
resting time 1 day
Total Time 1 day 48 minutes
Servings 9 squares

Equipment

  • 1 8x8 square pan
  • parchment paper
  • hand torch

Ingredients

bars

  • ¾ cup unsalted butter
  • ¾ cup brown sugar packed
  • ¼ cup honey
  • 1 egg room temperature
  • 1 egg yolk room temperatire
  • 1 ½ tsp vanilla
  • ½ tsp cinnamon
  • ½ tsp salt
  • ½ tsp baking soda
  • 1 ¼ cups all-purpose flour
  • 1 ½ cups rolled oats

marshmallow cream

Instructions

  • brown the butter. add brown sugar and honey. let cool for 5 minutes.
    ¾ cup unsalted butter, ¾ cup brown sugar, ¼ cup honey
  • whisk in the egg, egg yolk, vanilla, cinnamon, salt, and baking soda until smooth.
    1 egg, 1 ½ tsp vanilla, ½ tsp cinnamon, ½ tsp salt, ½ tsp baking soda
  • stir in flour until just combined, then fold in oats.
    1 ¼ cups all-purpose flour, 1 ½ cups rolled oats
  • line an 8x8-inch pan with parchment paper. bake at 350°F (175°C) for 20–23 minutes until golden brown let cool completely.
  • spread the marshmallow cream over the cooled oatmeal bars.

Video

Notes

Storage
Room Temp: Up to 2 days in an airtight container.
Fridge: 5–7 days, airtight (bring to room temp before serving).
Freezer: Up to 1 month, wrapped well.