About 7 years ago, Starbucks had a pastry called Fantasy Bars. The chocolate chunk filled dough tasted like a chocolate chip cookie but also incorporated the taste and texture of crunchy toffee. My son adored these bars. Once a week, after middle school, a Fantasy Bar was his after school snack. For some reason, Starbucks discontinued carrying them. Back then, it didn’t occur to me to try to make them myself. To be honest, it still hadn’t occurred to me when I made these Chewy Chocolate Toffee Marshmallow Cookie Bars and sent them off in a Monday Box. I had simply been attracted to the bar’s ingredients and chewy consistency.
Sometimes when I send new recipes in a Monday Box, its not easy getting feedback. In all fairness, I suppose that classes and homework should take priority over test recipe analysis. But by the time I have an actual conversation with my son (beyond a cryptic text letting me know he is alive and well and living in Chicago), he can’t remember having eaten a specific cookie. It came. He ate it. He thinks it must have been good.
So, I was surprised to get a call specifically about these Chewy Chocolate Toffee Marshmallow Cookie Bars. My enthusiastic reviewer reported that they tasted a lot like Fantasy Bars, but with less toffee taste. Hmmmm. Being that there was no toffee at all in the original recipe, I wasn’t sure where ANY toffee taste was coming from (other than maybe some melted marshmallow crème). Next round, I threw in toffee bits and our version of Fantasy Bars was born.
When cutting Chewy Chocolate Toffee Marshmallow Cookie Bars for a fancy platter or crunch-adverse consumers, trim the crunchy edges around the outer edge of the pan before cutting into bars. We love the crunchy with the chewy, so I leave the edges on. It makes for a kind of funky shape but it tastes good.
Chewy Chocolate Toffee Marshmallow Cookie Bars
- 2 cups all-purpose flour
- ½ teaspoon baking soda
- ¾ cup 1 ½ sticks salted butter, melted and cooled
- 1 cup brown sugar I use dark brown
- ½ cup granulated sugar
- 1 egg + 1 egg yolk room temperature
- 2 teaspoons vanilla extract
- 1 cup chocolate chunks
- ½ cup heath toffee bits I use the chocolate covered bits
- ¾ cup marshmallow creme
Pre-heat oven to 350 degrees F. Butter and lightly flour a 9”x 13” baking pan.
In a large bowl, whisk together the flour and baking soda.
In the bowl of the electric mixer, combine the butter and sugars.
Add the egg, egg yolk, and vanilla and beat until fluffy.
Gradually add the flour mixture, mixing until combined and a crumbly dough forms.
Fold in the chocolate chunks and toffee bits.
Barely fold in marshmallow fluff, leaving stripes of fluff visible in the dough.
Press the dough into the baking pan, spreading evenly.
Bake for 25 minutes then cover loosely with foil and bake an additional 5-10 minutes until the edges are golden brown.
Cool for 30 minutes in the pan and then cut into bars. For flat, even bars trim outside edges before cutting into bars.
Store in an airtight container at room temperature for up to 1 week.
Wrap the bars individually (or in pairs) in plastic wrap before storing in an airtight container (or zip lock bag) at room temperature for up to 1 week. Though the bars still taste good after 1 week, they tend to dry out and become less chewy.