Preheat oven to 180 degrees Celsius.

Beat eggs thoroughly.

Gradually add sugar to the beaten eggs and continue beating.

In a separate bowl, combine chocolate powder, flour, baking powder, and mix well.

Add the dry ingredients to the egg and sugar mixture.

Pour in boiling water and cooking oil.

Mix all ingredients until well combined.

Pour the cupcake mix into cupcake liners.

Bake at 180 degrees Celsius for 20 to 25 minutes, or until a toothpick inserted into the center comes out clean.

While the cupcakes are baking, prepare the frosting.

In a pot, combine sugar, milk, chocolate milk, margarine, and cornstarch.

Bring the frosting mixture to a boil, stirring constantly to prevent burning.

Continue stirring until the frosting thickens to a desired consistency.

Remove the cupcakes from the oven and let them cool.

Once the cupcakes are cooled, spread the frosting on top of each cupcake.

Sprinkle chocolate sprinkles over the frosting.

Serve and enjoy!