The French duo went through two qualifying rounds to reach the final in the Croatian city.
A dominant performance in the gold medal match saw Muller and Baudouin secure a comfortable 16-4 victory over rivals Anastasiia Galashina and Vladimir Maslennikov of Russia.
Russia’s second team of Yulia Karimova and Sergey Kamenskiy took the bronze medal, with a 16-6 victory over Israelis Tal Engler and Sergey Richter.
The 10m mixed team air pistol competition saw Russians Vitalina Batsarashkina and Artem Chernousov reach the podium.
A close final saw the Russian team claim a 17-13 victory over Serbs Zorana Arunovic and Damir Mikec.
Portugal’s Joana Castelão and João Costa claimed a 16-14 victory over Austrians Sylvia Steiner and Richard Zechmeister in the bronze medal competition.
The first event of the day saw Hungarian Soma Richard Hammerl produce a superb performance to win the men’s three-position junior 50-meter rifle title.
Hammerl finished the competition with a European junior record score of 464.8, surpassing the previous mark of 462.9 set by Czech Filip Nepejchal in 2019.
Russian Matvei Potapov settled for second place with a score of 457.4, his teammate Nikita Tursnov being eliminated in third place with 445.2.
Russian shooters were again forced to settle for silver and bronze medals in the junior girls’ skeet event.
Italy’s Sara Bongini triumphed in the final by hitting 47 of the competition’s 60 targets.
She finished two points ahead of Russian Ariana Kuzentsova, who finished 45th.
Russia’s Daria Lekomtseva completed the top three, after being eliminated by a score of 39 points.
Italian Cristian Ghilli was a winner of the junior boys’ skeet competition.
He finished with a total of 53 points, with Cypriot Kleanthis Varnavides finishing in second place with 52 points.
Varnavides teammate Petros Englezoudis completed the podium after being eliminated in 44th place.