Preheat oven to 325 degrees F and thoroughly grease your pan, especially if you are using a bundt pan or loaf pan with an intricate design.

Combine the butter and sugar, mixing well until it is a creamy consistency

Combine flour, salt, baking powder in a separate bowl, stir until combined

Add eggs to the butter and sugar mixture, mix until combined

Add butter and vanilla extract

Add half of the milk then Gradually add about half of the flour mixture in

Add the rest of the milk, followed by the rest of the flour mixture

Once well combined, pour the mixture into the greased pan, and bake for about one hour.

To check if its cooked, insert a toothpick or skewer into the center, it should come out clean. Cook times vary depending on the pan used and the oven, so it may need slightly more time.

Puree blackberries in a food processor, then strain in a fine mesh sieve. You may need to gently press the mixture against the sieve with a spoon to extract the liquid

Discard the seeds/remainder

combine the powdered sugar, milk, and blackberry juice in a bowl.

Whisk together until desired consistency, adding more milk if needed.

Once the cake has cooled completely, add glaze to the top