Preheat the oven to 325ºF and line a 9x5-inch loaf pan with parchment paper.
In a large mixing bowl, mix sugar and eggs on low for 30 seconds. Then increase the speed to high and beat until the mixture is pale and voluminous, about 2-3 minutes.
1 cup granulated sugar, 3 large eggs
Stir in the milk and vanilla until combined.
½ cup whole milk, 2 teaspoons vanilla extract
Add the flour, baking powder, and salt. Stir in just until combined.
2 cups all purpose flour, 2 teaspoons baking powder, ½ tsp salt
Add the melted butter, and mix gently to combine.
¾ cup unsalted butter
Stir in the chocolate chips until combined. Don't overmix.
1 cup mini semi sweet chocolate chips
Pour the cake batter into the prepared baking pan.
Bake for about 50-60 minutes, or until the cake is golden brown and a toothpick inserted into the middle comes out clean. If the cake is browning too quickly, you can tent a piece of aluminum foil over the top of the pan.
Remove from the oven and sprinkle additional chocolate chips over the top.
Let the cake cool in the pan for 10 minutes.
Remove to a wire rack to finish cooling to room temperature.
Slice, serve and enjoy!
Notes
Flour: Weighing the flour is the most accurate way to measure it. You can also sift or stir it to break it up, then lightly spoon into the measuring cup, and level. Avoid packing the flour as that will give you a dense, dry cake.
Butter: If you would like to use salted butter, just use an equal amount of salted butter and reduce the salt to a pinch or two. Also, the butter should be melted, but hot, sizzling butter can give you greasy cake.
Mini semisweet chocolate chips: It’s important to use the mini size chocolate chips in this cake. The mini size are small enough to be suspended in the batter where they will remain evenly distributed throughout the cake. If you'd like to use regular chocolate chips, toss the chocolate chips with 1 tablespoon of flour before adding to the batter.
Baking: Oven temperatures vary! Please adjust the baking time according to how your oven bakes.