diff --git a/spring-kafka/src/main/java/org/springframework/kafka/core/KafkaTemplate.java b/spring-kafka/src/main/java/org/springframework/kafka/core/KafkaTemplate.java
index 9b58fc669f..d037c20e0a 100644
--- a/spring-kafka/src/main/java/org/springframework/kafka/core/KafkaTemplate.java
+++ b/spring-kafka/src/main/java/org/springframework/kafka/core/KafkaTemplate.java
@@ -80,6 +80,7 @@
 import org.springframework.transaction.support.TransactionSynchronizationManager;
 import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
+import org.springframework.util.StringUtils;
 
 import io.micrometer.observation.Observation;
 import io.micrometer.observation.ObservationRegistry;
@@ -485,8 +486,9 @@ public void afterSingletonsInstantiated() {
 			if (this.kafkaAdmin == null) {
 				this.kafkaAdmin = this.applicationContext.getBeanProvider(KafkaAdmin.class).getIfUnique();
 				if (this.kafkaAdmin != null) {
-					Object producerServers = this.producerFactory.getConfigurationProperties()
-							.get(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG);
+					String producerServers = this.producerFactory.getConfigurationProperties()
+							.get(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG).toString();
+					producerServers = removeLeadingAndTrailingBrackets(producerServers);
 					String adminServers = getAdminBootstrapAddress();
 					if (!producerServers.equals(adminServers)) {
 						Map<String, Object> props = new HashMap<>(this.kafkaAdmin.getConfigurationProperties());
@@ -510,7 +512,6 @@ else if (this.micrometerEnabled) {
 	private String getAdminBootstrapAddress() {
 		// Retrieve bootstrap servers from KafkaAdmin bootstrap supplier if available
 		String adminServers = this.kafkaAdmin.getBootstrapServers();
-
 		// Fallback to configuration properties if bootstrap servers are not set
 		if (adminServers == null) {
 			adminServers = this.kafkaAdmin.getConfigurationProperties().getOrDefault(
@@ -518,8 +519,7 @@ private String getAdminBootstrapAddress() {
 					""
 			).toString();
 		}
-
-		return adminServers;
+		return removeLeadingAndTrailingBrackets(adminServers);
 	}
 
 	@Nullable
@@ -1007,6 +1007,10 @@ public void destroy() {
 		}
 	}
 
+	private static String removeLeadingAndTrailingBrackets(String str) {
+		return StringUtils.trimTrailingCharacter(StringUtils.trimLeadingCharacter(str, '['), ']');
+	}
+
 	@SuppressWarnings("serial")
 	private static final class SkipAbortException extends RuntimeException {
 
diff --git a/spring-kafka/src/test/java/org/springframework/kafka/support/micrometer/ObservationTests.java b/spring-kafka/src/test/java/org/springframework/kafka/support/micrometer/ObservationTests.java
index 45fa015ac7..d93c606919 100644
--- a/spring-kafka/src/test/java/org/springframework/kafka/support/micrometer/ObservationTests.java
+++ b/spring-kafka/src/test/java/org/springframework/kafka/support/micrometer/ObservationTests.java
@@ -64,6 +64,7 @@
 import org.springframework.lang.Nullable;
 import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
+import org.springframework.util.StringUtils;
 
 import io.micrometer.common.KeyValues;
 import io.micrometer.core.instrument.MeterRegistry;
@@ -204,7 +205,7 @@ public KeyValues getLowCardinalityKeyValues(KafkaRecordReceiverContext context)
 						KeyValues.of("spring.kafka.listener.id", "obs1-0", "baz", "qux"))
 				.hasTimerWithNameAndTags("spring.kafka.listener", KeyValues.of("spring.kafka.listener.id", "obs2-0"));
 		assertThat(admin.getConfigurationProperties())
-				.containsEntry(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, broker.getBrokersAsString());
+				.containsEntry(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, List.of(broker.getBrokersAsString()));
 		// producer factory broker different to admin
 		KafkaAdmin pAdmin = KafkaTestUtils.getPropertyValue(template, "kafkaAdmin", KafkaAdmin.class);
 		assertThat(pAdmin.getOperationTimeout()).isEqualTo(admin.getOperationTimeout());
@@ -287,6 +288,14 @@ void observationErrorException(@Autowired ExceptionListener listener, @Autowired
 				.hasMessage("obs5 error");
 	}
 
+	@Test
+	void kafkaAdminNotRecreatedIfBootstrapServersSameInProducerAndAdminConfig(
+			@Autowired @Qualifier("reuseAdminBeanKafkaTemplate") KafkaTemplate<Integer, String> template,
+			@Autowired KafkaAdmin kafkaAdmin) {
+		// See this issue for more details: https://github.com/spring-projects/spring-kafka/issues/3466
+		assertThat(template.getKafkaAdmin()).isSameAs(kafkaAdmin);
+	}
+
 	@Configuration
 	@EnableKafka
 	public static class Config {
@@ -295,13 +304,16 @@ public static class Config {
 
 		@Bean
 		KafkaAdmin admin(EmbeddedKafkaBroker broker) {
+			String[] brokers = StringUtils.commaDelimitedListToStringArray(broker.getBrokersAsString());
+			List<String> brokersAsList = Arrays.asList(brokers);
 			KafkaAdmin admin = new KafkaAdmin(
-					Map.of(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, broker.getBrokersAsString()));
+					Map.of(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, brokersAsList));
 			admin.setOperationTimeout(42);
 			return admin;
 		}
 
 		@Bean
+		@Primary
 		ProducerFactory<Integer, String> producerFactory(EmbeddedKafkaBroker broker) {
 			Map<String, Object> producerProps = KafkaTestUtils.producerProps(broker);
 			producerProps.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, broker.getBrokersAsString() + ","
@@ -309,6 +321,13 @@ ProducerFactory<Integer, String> producerFactory(EmbeddedKafkaBroker broker) {
 			return new DefaultKafkaProducerFactory<>(producerProps);
 		}
 
+		@Bean
+		ProducerFactory<Integer, String> customProducerFactory(EmbeddedKafkaBroker broker) {
+			Map<String, Object> producerProps = KafkaTestUtils.producerProps(broker);
+			producerProps.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, broker.getBrokersAsString());
+			return new DefaultKafkaProducerFactory<>(producerProps);
+		}
+
 		@Bean
 		ConsumerFactory<Integer, String> consumerFactory(EmbeddedKafkaBroker broker) {
 			Map<String, Object> consumerProps = KafkaTestUtils.consumerProps("obs", "false", broker);
@@ -340,6 +359,14 @@ KafkaTemplate<Integer, String> throwableTemplate(ProducerFactory<Integer, String
 			return template;
 		}
 
+		@Bean
+		KafkaTemplate<Integer, String> reuseAdminBeanKafkaTemplate(
+				@Qualifier("customProducerFactory") ProducerFactory<Integer, String> pf) {
+			KafkaTemplate<Integer, String> template = new KafkaTemplate<>(pf);
+			template.setObservationEnabled(true);
+			return template;
+		}
+
 		@Bean
 		ConcurrentKafkaListenerContainerFactory<Integer, String> kafkaListenerContainerFactory(
 				ConsumerFactory<Integer, String> cf) {