In a medium bowl, sift together 1 ½ cups all-purpose flour, ¾ cup unsweetened cocoa powder, 1 ½ teaspoons baking powder, ½ teaspoon baking soda, and ¼ teaspoon salt. This step is crucial as it aerates the dry ingredients and helps eliminate any lumps, ensuring that your Ultimate Fudgy Chocolate Cake has a perfectly smooth texture. Set the bowl aside for later use.

In a large mixing bowl, use a hand mixer or stand mixer to beat ¾ cup softened unsalted butter with 1 ½ cups granulated sugar. Mix on medium speed for about 3-5 minutes until the mixture is light and fluffy.

Next, add 3 large eggs to the creamed butter mixture, one at a time, mixing well after each addition. Stir in 2 teaspoons of vanilla extract along with 4 ounces of melted dark chocolate.

Gradually incorporate your prepared dry ingredients into the wet mixture, alternating with ½ cup room-temperature buttermilk. Mix on low speed until just combined.

Preheat your oven to 350°F (175°C) and prepare a 9-inch round cake pan by lining it with parchment paper and greasing the sides. Pour the batter into the pan and bake for 30-35 minutes.

Once baked, remove the cake from the oven and let it cool in the pan for about 10 minutes. Carefully turn it out onto a wire rack to cool completely.

In a small saucepan, heat ½ cup of heavy cream over low heat until just simmering, then add 4 ounces of chopped semi-sweet chocolate. Stir until the chocolate is fully melted and the mixture is silky smooth. Drizzle this rich ganache over your cooled Ultimate Fudgy Chocolate Cake for a stunning and decadent finish.