1. Prepare the Cake Batter:

In a large mixing bowl, beat the sugar and melted butter together until light and fluffy.
Add the eggs, one at a time, beating well after each addition until fully incorporated.
Mix in the vanilla extract, ensuring the mixture is smooth and fragrant.
In a separate bowl, whisk together the flour, baking soda, baking powder, and salt.
Gradually add the dry ingredients to the wet mixture, alternating with the buttermilk. Start and end with the dry ingredients, mixing just until combined. Avoid overmixing to keep the cake tender.

2. Bake the Cake:

Preheat your oven to 350°F (175°C).
Grease a 10-inch baking pan (or bundt pan) with oil or non-stick spray.
Pour the batter into the prepared pan, filling it evenly.
Bake for 55-70 minutes, or until a toothpick inserted into the center comes out clean.
Remove the cake from the oven and let it cool in the pan for 10 minutes.

3. Make the Buttermilk Sauce:

In a small saucepan over medium heat, combine the sugar, cubed butter, and water.
Stir continuously until the sugar dissolves and the butter melts completely.
Remove from heat and mix in the vanilla extract. Be cautious while stirring near open flames.

4. Assemble the Cake:

Carefully run a knife around the edges of the pan to release the cake. Invert it onto a wire rack placed over a sheet of waxed paper.
Using a skewer or fork, poke small holes all over the cake.
Drizzle 1/4 cup of the prepared buttermilk sauce over the cake, allowing it to soak in.
Let the cake rest for 15-20 minutes to fully absorb the sauce.

5. Serve and Enjoy:

Slice the cake and serve it warm or at room temperature.
Drizzle additional sauce over each slice for an extra decadent experience.
Pair with whipped cream, fresh berries, or a scoop of vanilla ice cream if desired.

For a richer flavor: Let the cake rest overnight before serving to allow the flavors to develop further.
Extra sauce storage: The buttermilk sauce can be stored in an airtight container in the refrigerator for up to 1 week. Reheat gently before use.
Gluten-free option: Substitute all-purpose flour with a 1:1 gluten-free baking mix.

Enjoy this delightful treat!