Preheat oven to 350 degrees F. Insert cupcake liners into a cupcake tin. In a medium bowl, whisk together the flour, baking powder and salt. In a measuring cup, measure out the milk and then whisk in the sour cream or yogurt. Set aside.

In the bowl of a stand-up mixer, add the butter, sugar and honey. Cream together until light and fluffy, about 2 minutes. Crack in the eggs and mix until combined. Add the flour in a few batches, alternating with the milk/yogurt mixture, until combined.

Divide the batter amongst the 12 cupcake liners, filling them up about 3/4 of the way. Transfer to the oven to bake for 15 to 18 minutes, until a skewer when inserted into the center comes out clean. Allow to cool for 5 minutes before moving cupcakes to a cooling rack.

In a saucepan, add the butter and melt over medium-low heat. Turn the heat off and open the tea bags and pour the chamomile leaves into the butter. Allow to steep for 10 minutes. Pour the melted butter through a sieve to remove and discard the chamomile leaves. Place the strained and melted butter in the fridge to cool for 45 minutes to 1 hour. The butter should be softened but not rock hard.

Transfer the butter to a stand-up mixer, along with the sifted powdered sugar, salt and heavy cream. Beat until light and fluffy, about 1 to 2 minutes.