Lemon S’mores Cupcakes

Fluffy white cupcakes filled with tart lemon curd and topped with marshmallow frosting and toasted graham cracker crumbs. Lemon S'mores Cupcakes // @HealthyDelish

I’m not going to lie – these cupcakes take a little more effort than most of my recipes. They’re worth every last dish they’ll dirty though. They’re my new gold standard for cupcakes.

The white cake is light, fluffy, and has the most delicate crumb I’ve ever experienced in something homemade. The cake is mild and sweet – similar to angelfood cake – making it the perfect backdrop for the shocking tartness of lemon curd hidden inside. Each cupcake gets topped off with a dollop of sticky-sweet marshmallow frosting and a sprinkle of graham crackers before it gets toasted to perfection under the broiler, giving them a subtle campfire taste.

If you haven’t already planned your Easter dessert, these cupcakes will be perfect. (Plus, if you’re like me and forgot to buy white eggs to dye instead of instinctively grabbing an extra carton of brown ones, you’re in luck because this recipe uses about a million egg whites. If you’re feeling ambitious, you can use the yolks to make your own lemon curd for the filling.)

Cupcake Ingredients

These cupcakes were inspired by a recipe for lemon s’mores that I found on Pinterest. I’m obsessed with lemon (have you checked out my lemon love board yet?), so lemon curd and toasted marshmallow sandwiches between graham crackers seemed even more amazing to me than the traditional chocolate. And as smitten as I was with the original concept, it seemed to be screaming to be made into a cupcake.

The ingredients are simple: flour, sugar, milk, egg whites, butter, vanilla, and cream of tarter. The cream of tarter helps stabilize the eggs whites to make the cake extra light and fluffy. It also gives the cake that elusive “birthday cake” flavor that always seems to be missing in cakes made from scratch.

Since I’ve been making an effort to use more whole wheat and whole white wheat flour in my savory recipes lately, I’ve been really into buying these little 2-pound bags of Gold Medal all purpose flour to use for baking. Whole wheat flour just won’t work in a recipe like this and I love that the small bags last a while but don’t take up too much room in my cabinet.

Lemon S'mores Cupcakes // @HealthyDelish

Once the cupcakes are cooled, they get filled with lemon curd. This is my favorite part of the recipe! I used a sharp paring knife to cut out a cone shape from the center of each cupcake, then spoon in a little curd before replacing it. Don’t worry if it doesn’t look perfect – it’ll get hidden under the frosting anyway.

Marshmallow FrostingMarshmallow Frosting

For these cupcakes, you’ll have to whip egg whites twice – once for the cake and then again for the frosting. If you plan ahead, you can use the same bowl both times and save yourself from having another dish to wash. Just make sure to grab a heat proof bowl when you’re whipping the eggs whites for the cake!

This frosting is so good. It tastes like marshmallow fluff, but it’s way easier to make than marshmallows (plus you don’t need gelatin, just egg whites and sugar). It’s pretty sweet, but like the cake it goes really well with the lemon curd. Plus once it gets toasted, it’s just about the best thing ever!

Lemon S'mores Cupcakes // @HealthyDelish

5.0 from 1 reviews
Lemon S'mores Cupcakes
 
Prep time
Cook time
Total time
 
Author:
Serves: 24
Ingredients
For the cupcakes
  • 2⅓ cup Gold Medal® all purpose flour
  • 2¾ teaspoon baking powder
  • ¼ teaspoon salt
  • 1¾ cup sugar
  • ¾ cup unsalted butter, softened
  • 1 teaspoon vanilla
  • 1 cup reduced fat milk
  • 5 egg whites
  • ¼ teaspoon cream of tarter
  • ½ cup lemon curd
For the frosting
  • 6 egg whites
  • 1½ cups sugar
  • ½ teaspoon cream of tarter
  • pinch salt
  • 3 whole graham crackers, crushed
Preparation
To make the cupcakes:
  1. Heat oven to 350ºF. Line 2 cupcake pans with 24 liners.
  2. Sift together the flour, baking powder, and salt. Set aside.
  3. In the bowl of a stand mixer or a medium mixing bowl, beat the sugar and butter until light and fluffy.Beat in the vanilla and ½ cup of milk until just blended. Add half the flour mixture and mix on low speed until combined. Add the remaining milk; mix until combined. Add the remaining flour and mix until just combined.
  4. In a second bowl, add the egg whites and cream of tarter. Beat with an electric mixer on high until the egg whites are glossy and form stuff peak when the mixer is lifted. Gently fold the egg whites into the batter, one quarter at a time.
  5. Divide the batter between the prepared cupcake pans. Bake 20-25 minutes, or until a toothpick inserted into the center of a cupcake comes out clean. Remove from the oven and let cool completely.
To make the Icing:
  1. Fill a pot with 1inch of water; bring to a simmer. Combine the egg whites, sugar, cream of tarter, and salt in a heatproof bowl. Set the bowl over the pot and cook for 3-4 minutes or until the mixture reaches 160ºF, whisking constantly. Remove from heat and whisk on high for 7-10 minutes, or until the frosting holds stiff peaks.
To Assemble:
  1. Heat broiler on high.
  2. Use a paring knife to cut a cone out of the center of each cupcake. Spoon 1 teaspoon of lemon curd into the hole, then replace the cake that you removed.
  3. Spoon or pipe 1 tablespoon of frosting onto the top of each cupcake. Sprinkle with graham cracker crumbs and lace on a baking sheet.
  4. Broil for 1-2 minutes, or until graham cracker crumbs and marshmallow frosting are golden and toasted, but not burned (keep a close eye on them!)
Nutrition Information
Calories: 357 Fat: 8.2 Carbohydrates: 72.5 Protein: 3.7

This post was sponsored by Gold Medal Flour. Thank you for supporting the brands that keep me inspired in the kitchen!

Comments

  1. These are beautiful Lauren! That toasted topping is totally calling my name!

  2. Lemon, graham crackers, marshmallows… genius combination, Lauren!

  3. Ginny McMeans says:

    This lemony flavor must be fantastic!

  4. These look and sound sooooo good! I like the tip about the cream of tartar, totally gonna try it!

  5. (*swoon*) I am SO glad I discovered your blog yesterday! These look amazing. :)

  6. What a clever little twist using lemon, they look amazing!

  7. Lauren! Where have you been all my life?! Finding amazing food bloggers is like christmas morning all over again! So glad to have found you and stopped by!

  8. These are basically lemon meringue pie deconstructed and then REconstructed into cupcakes! Which automatically makes them delicious.

  9. Say wha ???? Want stat!

  10. I LOVE these :) What a brilliant idea Lauren!

  11. calling my name!

  12. I just can’t even. I mean they look so good. It’s such a perfect springtime dessert!

  13. These are beautiful!!

  14. Gorgeous and look delicious. I am going to have to try them…..

  15. Who can blame your lemon obsession. It’s one of my favorite spring ingredients. I always keep a stash in my fridge. I discovered these beauties on Pinterest. They look gorgeous!

  16. Oh my gosh, Lauren… I’m drooling all over myself! These look amazing!

  17. These look so darn good! I love lemon pie so lemon cupcakes would just be that much better!

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