In a large mixing bowl, combine the flour, sugar, cocoa powder, and salt. Whisk together until well blended.
Add the softened butter, milk, and vanilla extract to the dry ingredients. Mix with a spatula or electric mixer until smooth and creamy.
Fold in the chocolate chips until evenly distributed throughout the batter.
Taste the batter and adjust sweetness or chocolate flavor if desired by adding more sugar or cocoa powder.
Serve immediately or refrigerate for about 30 minutes for a thicker consistency. Enjoy it straight from the bowl or use as a dip for fruits or pretzels.