Simple Blackcurrant Coffee Cake with Crumb Top

Name: Simple Blackcurrant Coffee Cake with Crumb Top
Prep time: 30 min
Cook time: 55 min
Total time: 1 h 25 min
Cuisine: European
Ingredients: 1 star anise (or 1/2 teaspoon ground); 1 3/4 cups all-purpose flour (225 grams); 1 teaspoon baking powder; 1 teaspoon salt; 2 sticks softened butter (225 grams); 1 cup + 2 tablespoons sugar (225 grams); 3 large eggs (room temperature); 5 tablespoons buttermilk (room temperature); 1 teaspoon vanilla extract; 1 teaspoon orange zest and juice of one medium-small orange; 1/4 teaspoon orange extract; 2 cups fresh or frozen blackcurrants (225 grams); 1/2 cup melted butter (113 grams); 1 1/2 cup all-purpose flour (190 grams); 1/3 cup granulated sugar (65 grams); 1/3 cup brown sugar (or more granulated sugar, 65 grams); 1/4 teaspoon ground star anise (optional); 1/4 teaspoon salt; 3/4 cup blackcurrants (80 grams); 3 tablespoons dark rum; 1 tablespoon blackcurrant syrup; 3/4 cup powdered sugar (100 grams)