1. Preheat your oven to 350°F (175°C).
2. In a large bowl, cream together the softened butter and sugar until light and fluffy.
3. Add the egg and vanilla extract, mixing until well combined.
4. In a separate bowl, whisk together the flour, baking powder, and salt.
5. Gradually add the dry ingredients to the wet mixture, stirring until a dough forms.
6. Roll the dough into small balls and place them in a greased muffin tin, pressing down to form cups.
7. Bake for 10-12 minutes or until the edges are lightly golden.
8. Remove from the oven and let cool before filling with chocolate eggs or candy.
9. Decorate with colored sprinkles.

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