Preheat oven to 350°F (175°C) and line a muffin tin with cupcake liners.

Prepare the Cupcake Batter:

• In a large bowl, whisk together the dry ingredients (flour, sugar, baking powder, salt).
• In a separate bowl, mix the wet ingredients (milk, oil or melted butter, eggs, vanilla extract).
• Gradually combine the wet ingredients with the dry ingredients and stir until smooth.

Make the Filling:

• In a separate bowl, mix a small amount of the cupcake batter with pink or blue food coloring (depending on the gender you’re revealing) to create the surprise filling.

Fill the Cupcake Liners:

• Spoon a small amount of plain cupcake batter into each liner, then place a teaspoon of the colored batter in the center, and cover with more plain batter.

Bake:

• Bake the cupcakes in the preheated oven for 18-20 minutes or until a toothpick inserted into the center comes out clean.

Cool:

• Allow cupcakes to cool completely on a cooling rack before frosting.

Prepare the Frosting:

• Beat the softened butter in a bowl until creamy.
• Gradually add powdered sugar, milk, and vanilla extract. Mix until smooth and fluffy.
• Divide frosting into two bowls. Color one portion with pink or blue food coloring.

Decorate the Cupcakes:

• Once cooled, use a piping bag to frost the cupcakes with your chosen frosting. You can use a dual-color swirl or rosette design to make the cupcakes look extra festive.

Serve:

• Once frosted, the cupcakes are ready to be enjoyed at your gender reveal party!