Anna, 30, enlisted the help of her five other children to break the happy news. The kids poured liquid into a fake beehive and pink foam spilled out.
"This is the 6th gender reveal for our little family and it always so exciting! Each child God has given us is unique and special — we all look forward to the arrival of our daughter / sister this fall!" she wrote in the caption.
The reality star went on to share a special story about how late grandmother Mary Duggar inspired her to do a cake gender reveal with her first child Mackenzie, 9.
She continued, "When I was expecting Kynzie, Grandma Duggar excitedly told me of a “new trend” that featured baking a gender reveal cake. Grandma asked if she and Amy could bake one for us?!?! Josh and I loved the idea and that was our plan...until our producers heard about the idea and it grew quite a bit!
"Buddy the Cake Boss ended up baking the first gender reveal cake for us! We were thrilled to cut into our pink cake with Meredith Vieira in NYC. All that to say, Grandma was the one who sparked this special tradition for our family and it sounds like a lot of other families have enjoyed the idea over the years as well!" she added.
Anna explained how meaningful it was that she was able to share her baby joy with their late grandmother before she passed away suddenly after an accidental drowning on June 9.
She concluded, "With Grandma’s passing last week, this 6th gender reveal is a reminder of her love — I’m so glad we were able to share the news of our third little girl with Great-Grandma before she went to be with Jesus!"
Are you excited it's a baby girl for Josh and Anna? Sound off in the comments below!