Easter Mini Egg Cupcakes

Cupcakes:

• 1 1/3 cups all-purpose flour
• 1 1/2 tsp baking soda
• 1/2 tsp kosher salt
• 3/4 cup granulated sugar
• 1/2 cup unsalted butter, at room temperature
• 1/2 cup Greek yogurt
• 1 large egg, room temperature
• 1 large egg yolk
• 1 tbsp vanilla (either bean paste, powder, or beans from a 2 pods, I don't know if extract will give the same flavour-fulness)

Frosting:

• 1 cup unsalted butter, at room temperature
• 3-4 cups icing (confectioner's) sugar
• 1 tbsp vanilla (either bean paste, powder, or beans from a 2 pods, I don't know if extract will give the same flavour-fulness)
• 1/2 tsp kosher salt
• 2 tbsp whipping cream
• 36 Cadbury Mini Eggs (optional)