Prepare the Brownies: Bake your homemade brownies according to your recipe or package instructions. Allow them to cool completely at room temperature for about 30 minutes, then cut into small squares.

Make the Custard: In a medium saucepan, prepare your homemade custard over medium heat, whisking continuously until it thickens (10-15 minutes). Remove from heat, cool slightly, then refrigerate for at least 30 minutes.

Whip the Cream: While the custard chills, whip heavy cream in a mixing bowl using an electric mixer on medium-high speed for 3-5 minutes until soft peaks form. Fold the cream into the cooled custard.

Layer the Ingredients: In a clear glass bowl, layer brownies, custard, and whipped cream mixture. Repeat until ingredients are used, finishing with whipped cream on top.

Chill the Trifle: Cover and refrigerate for at least 2 hours, or overnight if possible, to meld flavors and hold layers together.

Add Optional Toppings: Before serving, sprinkle chocolate shavings or fresh berries on top for added flavor and visual appeal.