1/2 cup sugar
2 egg whites
1/2 cup softened butter
1/4 - 1/2 tea pure vanilla extract
whisk egg whites and sugar in a heat proof bowl. Place bowl over simmering water without letting the bowl touch the water. whisk mixture until hot to the touch and the sugar melts. Remove from heat. scrape into the bowl of a stand mixer with a whisk attachment. Whip on high until light, white and has cooled. 4 - 6 minutes. reduce the speed and add chunks of butter one at a time and beat until smooth 5 min or so. then mix in vanilla and salt.
3/4 cup heavy cream
1 cup dark or bittersweet chocolate chips (or chopped)
1 tbl butter
Heat cream in a pan CAREFUL not to burn it or boil it. The cream needs to be very hot. Remove from heat and stir in chocolate. whisk until smooth. add butter continue to stir. Spead or pipe when at room temp.
In a large bowl, beat butter and peanut butter until light and fluffy. Slowly beat in 1/2 of the confectioner's sugar. Mix in 1/4 cup of the cream. Beat in the remaining confectioners' sugar. If necessary, add a little more cream or milk until the frosting reaches a good spreading consistency.