Heat the oven to 350F. Line an 8 inch square pan with parchment paper.
In a mixing bowl cream the butter and sugar until light and fluffy, about 2 minutes. Add 2 eggs, one at a time, mixing well after each addition. Add the vanilla extract and mix, scraping the sides of the bowl. Slowly add the cocoa powder, salt and flour and stir until just combined.
Reserve 3/4 cup of the batter. Spread the remaining batter in the prepared pan.
Add the unwrapped caramel kisses and arrange them on top of the brownie batter.
Mix the reserved 3/4 cup brownie batter with the remaining egg. Pour it over the caramel kisses.
Bake the brownies in the preheated oven for about 33 minutes.
Remove from the oven and cool completely before cutting them into bars.