Line an 8x8” square pan with parchment paper
In a heatproof bowl rub the zest between your fingers into the sugar to release the oils.
Set the butter in the center of the sugar then microwave it for about a minute or two until it’s almost but not fully melted.
Grind the freeze dried berries until they are a powder and sift them into the melted butter (you can reserve some of the powder for the glaze if you like).
Add the strawberry butter, along with the vanilla and salt to the sugar and whisk very well.
Add the eggs and whisk for a full 60 seconds, vigorously until the mix is light and creamy.
Fold in the flour. Pour into pan.
Preheat the oven to 350 F. Let the batter rest while the oven preheats.
Bake for 30-40 minutes, until puffed up slightly in the center.
Once cool, whisk together all the ingredients for the glaze and spread on top. They might brown a bit on top, that’s fine.
Store brownies in the fridge in an airtight container (they don’t have to be in the fridge but the texture is quite nice when cold).