The ideal grain bill for a Belgian Tripel mainly consists of Pilsner malt. You can start with around 12 lb (5.4 kg) of German Pilsner malt and add on ½ lb (227 g) of Aromatic Malt and another ½ lb (227 g) of Victory malt. It's essential to add sugar, preferably 1 lb (454 g) of ordinary table sugar, before the boil but after the mash to achieve the desired light body and composition source.