I looked at this and oh my. I've made cookie dough truffles before and this seems to be similar with the addition of peanut butter. What makes me even more excited is that this is a modification of cookie dough dip - cookie dough is one of my favorite things if you didn't know :) You can go to Jessica's blog to look at more amazing pictures of these.
2 1/2 cups milk chocolate chips
1/2 cup unsalted butter
1/3 cup packed brown sugar
1 teaspoon vanilla extract
1/4 cup creamy peanut butter
3/4 cup powdered sugar
2 tablespoons all-purpose flour
1/4 teaspoon salt
1/2 cup mini chocolate chips
"In a small saucepan, heat butter until melted. Whisk in brown sugar until dissolved, then let it bubble for 1-2 minutes. Remove from heat and whisk in peanut butter. The mixture will be liquidly. Whisk in vanilla. Let sit and cool completely, about 20 minutes.
Line a mini muffin with with liners. Melt 1 1/4 cups of chocolate chips (I do mine in the microwave, heating on full power for 20 seconds, stir, 30 seconds again, and stir until melted). Drop 1/2-1 teaspoon of chocolate into each liner, then use a pastry brush to brush chocolate up the sides of the liner. Place in the freezer for 20 minutes. By this point the butter + sugar mix should be cool. Whisk in powdered sugar, salt and flour, until combine and few lumps remain. Fold in mini chocolate chips. The dough will be wet, but pop it in the fridge for 15 minutes to harden.
Remove muffin tin and cookie dough, then place 1 teaspoon of cookie dough (I somewhat rolled mine) into the chocolate cups. Place back in the freezer for 10-15 minutes. Melt the remaining chocolate chips, then cover each cookie dough top with chocolate, smoothing with a spoon. Freeze again for 15-20 minutes. These are fine out in room temperature for a few hours (they may soften a bit) but I like them best stored in the fridge.
Note: I’m sure if you temper your chocolate and let it sit at room temperature these will harden without the freezer, but this is what works for me best."