• Preheat oven to 350 degrees and put cupcake papers into a 12-cavity cupcake tin.
• In a medium bowl, whisk together flour, baking powder, baking soda, and salt.
• In the bowl of a stand mixer or in a large bowl with a hand mixer, cream together butter and sugar on medium-high speed until light and fluffy, about 3 minutes.
• Add eggs in one at a time, mixing well after each addition. Mix in vanilla extract.
• With mixer on low speed, beat in dry ingredients in 3 additions, alternating with buttermilk. Mix in each addition until just incorporated, taking care not to over-mix.
• Divide the batter into two equal portions and place in two separate bowls.
• Mix orange food coloring into the batter in one of the bowls and yellow food coloring into the other.
• Add a spoonful of yellow batter into each cupcake liner. Gently spoon orange batter on top, filling papers about ¾ of the way full.
• Bake for 18-20 minutes, until edges are golden and tester comes out clean. Let cupcakes cool in pan for a few minutes before removing to wire racks to cool completely.
• Once cupcakes are completely cooled, core out a small section from the middle (either using a cupcake corer or with a knife). Fill center of cupcake with marshmallow cream filling.
• Place a large piping bag fitted with a large open star piping tip (I use a Wilton 1M), in a tall drinking glass (this will make it easier to fill). Add orange frosting along one side of the bag, yellow to another, and white to another.
• Frost cupcakes using a swirl design. Garnish with candy corn, if desired.

Marshmallow Cream Filling

• Place marshmallow fluff, butter, and vanilla extract in the bowl of a stand mixer or in a large bowl with a hand mixer and beat until well combined.

Buttercream Frosting

• In the bowl of a stand mixer or in a large bowl with a hand mixer, beat butter until creamy.
• With mixer on low, slowly blend in the confectioner’s sugar, cup by cup until well-combined. Mix in cream, vanilla, and salt and blend until combined.
• Split the frosting into three equal portions and place in three bowls. Add orange food coloring to one portion and yellow to another. Leave the third portion white.