For bundt tins: Brush every ridge and curve generously with melted butter. Dust the tin lightly with plain flour and tap out any excess. This double layer is what helps the cake release cleanly. Once baked, allow the cake to cool in the tin for 10 minutes only. Place a wire rack over the tin and invert in one confident motion. If it feels a little stuck, give the base a firm tap several times and gently lift the tin away.
Tip: If your bundt tin has deep detail, chill the greased tin for 10 minutes before adding the batter. This helps set the butter layer and prevents sticking.