Preheat the oven to 375°F and line a cupcake pan with liners and set aside.
In a large mixing bowl or stand mixer fitted with a whisk attachment, combine all of the cupcake ingredients until well combined, making sure to scrape down the sides as needed.
1 box dark chocolate fudge cake mix, 1 (3.9 oz.) package chocolate fudge instant pudding mix, 4 large eggs, 1 cup sour cream, ¾ cup vegetable oil, ½ cup chocolate milk, 1 teaspoon vanilla extract, ¼ teaspoon salt, 1 cup mini chocolate chips
Add a scant ¼ cup of batter to each liner so they're about ¾ full.
Bake the cupcakes for about 18 to 20 minutes or until a toothpick inserted in the center of a cupcake comes out clean.
Let the cupcakes sit in the pan for a couple of minutes before transferring to a cooling rack to cool completely before frosting.
While the cupcakes are cooling, prepare the Chocolate Buttercream Frosting as indicated in the recipe instructions. 1 batch Best Chocolate Buttercream Frosting
Pipe the frosting onto the cooled cupcakes.
Add chocolate sprinkles to a small bowl and dip each of the frosting cupcakes upside down into the sprinkles to coat the top of the frosting.
Chocolate sprinkles
Break the chocolate bars along the short middle divet, then use a sharp knife to cut each half into quarters, then each quarter will get cut into two triangles. Each bar should make 8 pairs of ears. Stick two triangles in each of the cupcakes for the ears.
3 Hershey chocolate bars
Add a heart sprinkle and two candy eyes to each cupcake to make the face of the cat.
24 large heart sprinkles, 48 candy eyes
Break the pocky sticks in half and then stick two halves into each cheek of the face to make the whiskers.
48 Chocolate pocky sticks