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')
