Devil Dogs

1 . Stage

Make the cake batter: Beat sugar and butter in a mixing bowl with an electric mixer until creamy. Mix in egg.

2 . Stage

Sift flour, cocoa powder, baking soda, baking powder, and salt together into a bowl. Gradually mix dry ingredients into wet ingredients. Mix in milk and vanilla.

3 . Stage

Drop heaping tablespoons of batter onto ungreased cookie sheets to make an even number of cookies; there should be about 24.

4 . Stage

Bake in the preheated oven until cookies spring back when touched or a toothpick inserted into the center comes out clean, 7 to 8 minutes. Remove from the oven and let cool completely.

5 . Stage

While the cookies are cooling, make the filling: Whisk milk and flour together in a saucepan over low heat until a thick paste forms. Remove from the heat and cool completely.

6 . Stage

Beat sugar, shortening, vanilla, and salt in a bowl until creamy. Add cooled paste mixture and beat until fluffy; this could take some time and if paste is not completely cooled, it will look curdled.

7 . Stage

Spread filling onto half of the cooled cookies; sandwich with remaining cookies.