Preheat your oven to 175°C (350°F) and generously grease your bundt pan.
In a large mixing bowl, cream the softened butter and sugar until light and fluffy, about 3 minutes.
Add the eggs one at a time, beating well after each addition.
Stir in the vanilla extract. Then, alternate adding the flour mixture (mixed with baking powder and salt) with the milk, starting and ending with the flour.
Baking
Pour the batter into the prepared bundt pan and smooth the top.
Bake for 35–40 minutes, or until a toothpick comes out clean. Allow to cool in the pan for 10 minutes before transferring to a wire rack to cool completely.
Making Ganache
Heat the heavy cream in a saucepan until just simmering. Pour over the chopped chocolate and let it sit for 2 minutes.
Stir the mixture until it becomes glossy and smooth, then allow to cool until thickened but still pourable.
Decorating & Serving
Once the cake is cool, pour the ganache over the top, letting it drip down the sides.
Top with whipped cream, fresh berries, mint leaves, and a dusting of powdered sugar. Add edible flowers if desired.
Notes
For the best flavor, chill the cake before serving. This chocolate ganache bundt cake can be made ahead and frozen without the toppings.