Preheat the oven to 350 and prepare an 8x8 pan with parchment or grease and set to the side.
Brown the butter in a small saucepan on low heat. The butter will melt, then foam, then turn golden brown.
While the butter is melting chop the chocolate. When the butter is done, pour the butter over the chocolate and add the oil. Mix until chocolate is fully melted.
In a large bowl, combine the sugars, salt, eggs, vanilla, and espresso powder. Whisk until light and foamy, about 5-6 minutes. Add in the melted chocolate and mix to combine.
Fold in the flour and cocoa powder, making sure everything is fully combined. Mix in the chocolate eggs.
Pour the batter into the prepared pan and top with the creme eggs and remaining chocolate eggs. Bake in the oven for 30-35 minutes. Let the brownies cool in the pan for 10-15 minutes before cutting.
