By THHT 
The soft and rich chocolate double biscuits filled with cream peanut butter turn into an explosion of great taste and texture. Sweet and a bit salty, chocolate, greasy and creamy inside… by far one of the best biscuits ever.
Ingredients
Makes about 18-19 cookies
1 1/4 cup (160g) all-purpose flour
1/3 cup (40g) unsweetened cocoa powder
3/4 tsp (4g) of baking soda
1/2 tsp (3g) salt
1/2 cup (113g) unsalted butter, room temperature
2 tbsp (30g) peanut butter
1/3 cup (70g) packed brown sugar
1/3 cup (70g) sugar
1 egg
1 tsp (5g) vanilla extract
1/3 cup (60g) semi-sweet chocolate chips
Flaky sea salt
Filling
2/3 cup (160g) creamy peanut butter
To decorate
M & Ms candies
HAN 
Emily