Chocolate Raspberry Layer Cake

INGREDIENTS

box yellow/white cake mix

1 cup

all-purpose flour

1 cup

granulated sugar

1/2 tsp

salt

large eggs

1 1/3 cups

water

2 tbsp

vegetable oil

1 cup

sour cream (250g carton)

2 tsp

vanilla extract

2 cups

frozen raspberries

Tbsps granulated sugar

1/4 cup

Dutch-processed cocoa (dissolved in 1/4 cup warm water)

1 cup

unsalted butter (room temperature)

1/2 cup

powdered sugar

sea salt

400 g

good quality dark chocolate (melted and cooled)