Bake cake in 13 x 9 inch pan according to package directions. After colling, poke holes in cake and pour Kahlua over it. Refridgerate over night.
When ready to assemble trifle, whip cream. Add milk to pudding and beat according to package directions.
Cut cake into cubes. Layer in a clear glass trifle dish (or glass bowl) 1/3 of each ingredient as follows: cake cubes, pudding, whipped cream, crushed candy bars. Repeat the layering two additional times ending with the whipped cream and candy bars.
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