Use this handy SQL to generate all grants that exist in the current database.
SELECT ( dp.state_desc + ' ' + dp.permission_name collate latin1_general_cs_as + ' ON ' + '[' + s.name + ']' + '.' + '[' + o.name + ']' + ' TO ' + '[' + dpr.name + ']' ) AS GRANT_STMT FROM sys.database_permissions AS dp INNER JOIN sys.objects AS o ON dp.major_id=o.object_id INNER JOIN sys.schemas AS s ON o.schema_id = s.schema_id INNER JOIN sys.database_principals AS dpr ON dp.grantee_principal_id=dpr.principal_id WHERE dpr.name NOT IN ('guest')