Hot Fudge Pudding Cake 🍫🔥

Step 1: Prepare Your Oven and Pan
Preheat your oven to 350°F (175°C). While it’s heating, grease an 8-inch square baking pan to ensure your cake doesn’t stick.
Step 2: Mix the Cocoa-Sugar Topping
In a small bowl, whisk together 1/2 cup of sugar and 1/4 cup of cocoa powder. Set this mixture aside for later.
Step 3: Combine Dry Ingredients
In another bowl, combine the all-purpose flour, the remaining 1/2 cup of sugar, the remaining 1/4 cup of cocoa powder, baking powder, and salt. Whisk until well mixed.
Step 4: Mix Wet Ingredients
In a separate bowl, whisk together the milk, melted butter, egg yolk, and vanilla extract. Slowly stir this mixture into the dry ingredients until just combined. Be careful not to over-mix; a few lumps are perfectly fine. Gently fold in the semisweet chocolate chips.
Step 5: Assemble the Cake