Use freshly brewed, cooled espresso or double-strength coffee instead of regular brewed coffee to intensify the tiramisu flavor and prevent the oats from becoming too diluted overnight.

Add oats and chia seeds first, then pour the coffee-milk mixture, and top with yogurt to create distinct flavor layers that develop beautifully as they meld overnight.

Reserve cocoa powder dusting for the morning to prevent it from absorbing moisture and clumping; this keeps the powder flavor bright and gives an authentic tiramisu presentation.

Use high-quality vanilla extract and measure honey carefully—too much honey makes the oats overly sweet and masks the coffee notes, while too little fails to capture the dessert essence.

Use full-fat Greek yogurt instead of regular yogurt to achieve the creamy, mascarpone-like consistency that mimics authentic tiramisu while adding protein for sustained energy.