Blueberry Lemon Whoopie Pies Two Ways

We had a paid baking gig! We were asked to make blueberry lemon whoopie pies for a baby shower, so we did some experimenting. We had never made them before, and couldn't decide if we wanted to make blueberry whoopie pies with lemon filling, or lemon whoopie pies with blueberry filling. So...we made both! And they were both really good! Here's the more common recipe for blueberry cake with lemon filling. Below this is the "inside out" version where we made lemon cakes and filled them with fluffy blueberry filling!

Blueberry Lemon Whoopie Pies

servings:12 whoopie pies
time: 45 minutes

Ingredients:
Blueberry cake:

• 2 1/2 cups flour
• 1 tsp baking powder
• 1/2 tsp baking soda
• 1 tsp salt
• 1 cup butter
• 1 cup sugar
• 2 eggs
• 1/2 tsp vanilla
• 1/2 cup milk
• 1 cup frozen blueberries

Lemon filling:

• 1 cup shortening
• 2 cups powdered sugar
• 1 cup marshmallow fluff
• 1/4 cup butter, softened
• zest from 1 lemon
• 1 tsp lemon extract

Instructions:

1. Preheat oven to 350 degrees and line a baking sheet with parchment paper.
2. In medium bowl, whisk together flour, baking powder, baking soda, and salt.
3. In bowl of stand mixer, cream butter and sugar.
4. Add eggs, vanilla, and milk and mix until incorporated.
5. Carefully fold in 2/3 cup of frozen blueberries.
6. Use a 2 Tbsp cookie scoop to measure out batter onto baking sheets. Leave about 2 1/2" between batter rounds.
7. Place remaining blueberries on top of the batter rounds.
8. Bake for 12 minutes and remove to wire racks to cool.
9. Meanwhile, make lemon filling: add all ingredients to bowl of stand mixer and beat until fully mixed and fluffy, about five minutes.
10. Spread about 2 Tbsp of filling on each half whoopie pie, then cover with a second cake.

There aren't many things that scream "Maine!" more than blueberry whoopie pies.

We really love this whoopie pie filling. It's very smooth and creamy, not too sweet, and is very stable, so it will keep well for several days.

Inside Out Blueberry Lemon Whoopie Pies

servings: 12 whoopie pies

time: 45 minutes

Ingredients:

Lemon cake:

• 2 1/2 cups flour
• 1 tsp baking powder
• 1/2 tsp baking soda
• 1 tsp salt
• 1 cup butter
• 1 cup sugar
• 2 eggs
• 1/2 tsp vanilla
• 1 tsp lemon extract
• 1/2 cup milk
• zest from 3 lemons

Blueberry filling:

• 1 cup blueberries
• 1/4 cup sugar
• 1 cup shortening
• 2 cups powdered sugar
• 1 cup marshmallow fluff
• 1/4 cup butter, softened

Instructions:

1. Preheat oven to 350 degrees and line a baking sheet with parchment paper.
2. In medium bowl, whisk together flour, baking powder, baking soda, and salt.
3. In bowl of stand mixer, cream butter and sugar.
4. Add eggs, vanilla, lemon extract, lemon zest, and milk and mix until incorporated.
5. Use a 2 Tbsp cookie scoop to measure out batter onto baking sheets. Leave about 2 1/2" between batter rounds.
6. Bake for 12 minutes and remove to wire racks to cool.
7. Meanwhile, make blueberry filling: mix blueberries and sugar in small saucepan and simmer over low heat. Cook, stirring occasionally, until mixture has reduced and thickened considerably, about 25 minutes. Set aside to cool.
8.  In bowl of stand mixer, beat shortening, powdered sugar, fluff, and butter until fully mixed.
9. Add blueberry reduction and whip until fluffy, about five minutes.
10. Spread about 2 Tbsp of filling on each half whoopie pie, then cover with a second cake.

Just starting the blueberry reduction. You can make this with any kind of berry and it makes the best fruity frostings and fillings. 

It should be very steamy and the berries should be releasing their liquid. 

Done! It will be very thick. Be sure to let it cool some before adding it to the filling. 

Whoopie pie batter is thick - much thicker than cake batter, and even thicker than brownie batter. 

Be sure to allow plenty of space between scoops as they will spread quite a bit while baking! 

Lemon whoopie pie halves! If you look closely you can see the bits of lemon zest in them. 

The blueberry reduction makes beautiful, bright filling. Piping the filling in is quick and easy. 

If you don't feel like piping, you can also just spread the filling with a knife or spoon. 

Both versions of the lemon-blueberry whoopie pie are delicious! And go ahead and make some lemonade with the fresh lemons you are discarding after zesting. 

Yum