Antonio Bachour: Red Velvet Raspberry Trifle

Name: Antonio Bachour: Red Velvet Raspberry Trifle
Prep time: 40 min
Cook time: 2 h 55 min
Total time: 2 h 55 min
Yield: 12 portions
Ingredients: 16 oz fresh raspberries; 4 oz sugar; 1 ½ tsp agar-agar; 4 oz sugar; 2 oz vegetable shortening; 1 large egg; 3 ½ oz buttermilk; 1 tsp vanilla extract; 1 tsp white vinegar; 2 tsp gel food coloring; 5 oz all-purpose flour; 3 tbsp Dutch-processed cocoa powder; 1 tsp baking soda; ½ tsp salt; 4 oz unsalted butter; 4 oz cream cheese; 8 oz confectioners sugar; 16 oz fresh raspberries