There are 8 Golden Spatulas in total in Bikini Bottom, here's a really quick round-up of where to find them:
1 - SpongeBob's closet - Pay 50 Shiny Objects to access the room it's in
2 - On top of SpongeBob's house - Activate the buttons next to SpongeBob's and Patrick's houses and reach the top of his house using the platforms before the time runs out
3 - Annoy Squidward - Go into Squidward's house, talk to him, then jump 5 times
4 - Sandy's Arena (Need 15 Golden Spatulas to access the second area of Bikini Bottom) - Enter Sandy's House and complete the combat arena challenge
5- Top of Sandy Shoals (Need Bubble Bowl ability) - Stand on the pressure switch and Bubble Bowl the switch next to the Police Station. Use the spring to get on the Police roof and jump across the cubes to reach the roof before the time runs out
6 - Clear the Krusty Krab (Need 40 Golden Spatulas to access the third area of Bikini Bottom) - Talk to Mr. Krabs outside of the Krusty Krab, go inside and clear out all the robots. Leave the Krusty Krab and talk to Mr. Krabs again
7 - Top of the Chum Bucket (Need Cruise Bubble ability) - Hit the 3 switches on the side of the Chum Bucket to spawn a spring next to it, jump on it to reach the roof and the Spatula
8 - Inside the Chum Bucket - Go inside the Chum Bucket and next to the door marked "Kitchen" is an L-shaped vent. Stand on a table, jump onto the vent and use SpongeBob's wall jump ability to reach it